I did some testing to compare gaming performance and input latency between Gnome and KDE
GAMING PERFORMANCE BENCHMARKS
Fedora 40 Cachy kernel 6.10.1 KDE Wayland Nvidia 555.58.02:
Tomb Raider GE-Proton9-10 1440P Highest settings Avg: 467.375
Min 371.3 362.0 365.3 378.5
Max 532.0 536.0 532.9 542.9
Avg 467.2 466.3 464.7 471.3
Cyberpunk2077 GE-Proton9-10 1440P Ultra preset Avg: 91.1075
Min 72.80 70.83 71.31 71.96
Max 119.54 115.79 114.68 116.38
Avg 92.62 90.41 90.26 91.14
Middle Earth Shadow of Mordor Proton8.0-5 1440P Ultra preset Avg: 384.5425
Min 29.91 172.67 200.44 175.93
Max 732.82 773.87 784.07 1147.84
Avg 388.32 389.44 388.87 371.54
Horizon Zero Dawn GE-Proton9-10 1440P Ultra preset Avg: 172.5
Min 75 76 68 88
Max 306 301 308 306
Avg 173 172 173 172
RDR2 GE-Proton9-10 1440P Highest Quality Preset Avg: 152.28225
Min 70.7965 71.0399 77.9417 64.7392
Max 206.774 204.082 206.356 197.714
Avg 152.76 150.934 153.388 152.047
Fedora 40 Cachy kernel 6.10.1 Gnome Wayland Nvidia 555.58.02:
Tomb Raider GE-Proton9-10 1440P Highest settings Avg: 494.6
Min 388.4 390.0 380.0 380.0
Max 580.0 574.0 578.0 586.8
Avg 495.0 496.6 493.2 493.6
Cyberpunk2077 GE-Proton9-10 1440P Ultra preset Avg: 88.3275
Min 72.28 70.52 69.63 71.60
Max 113.55 111.84 111.67 114.61
Avg 89.21 87.78 87.32 89.00
Middle Earth Shadow of Mordor Proton8.0-5 1440P Ultra preset Avg: 378.2225
Min 166.07 205.82 182.06 189.20
Max 699.01 740.32 726.59 696.09
Avg 384.01 374.51 372.37 382.00
Horizon Zero Dawn GE-Proton9-10 1440P Ultra preset Avg: 174.5
Min 78 76 80 26
Max 310 298 323 317
Avg 175 174 175 174
RDR2 GE-Proton9-10 1440P Highest Quality Preset Avg: 153.52975
Min 78.4751 73.0962 86.8251 76.1736
Max 216.268 211.336 219.409 210.757
Avg 156.054 154.054 153.164 150.847
INPUT LATENCY
***S22 Ultra Super slow mo (480fps apparently uses software interpolation to reach 960 fps)***
Gnome battlebit camera movement: (No ability to disable wayland Vsync)
***OS Vsync on Game vsync on Avg: 46.1428571429 Frames
***OS Vsync on Game Vsync off Avg: 17 Frames
Test1 OS Vsync on Game vsync on
Mouse starts moving = Frame 225
Movement on screen starts = Frame 273
Difference = 48 Frames
Test2 OS Vsync on Game vsync on
Mouse starts moving = Frame 265
Movement on screen starts = Frame 311
Difference = 46 frames
Test3 OS Vsync on Game vsync on
Mouse starts moving = Frame 242
Movement on screen starts = Frame 289
Difference = 47 frames
Test4 OS Vsync on Game vsync on
Mouse starts moving = Frame 253
Movement on screen starts = Frame 297
Difference = 44 frames
Test5 OS Vsync on Game vsync on
Mouse starts moving = Frame 235
Movement on screen starts = Frame 281
Difference = 46 frames 46
Test6 OS Vsync on Game vsync on
Mouse starts moving = Frame 205
Movement on screen starts = Frame 251
Difference = 46 frames
Test7 OS Vsync on Game vsync on
Mouse starts moving = Frame 49
Movement on screen starts = Frame 95
Difference = 46 frames
Test8 OS Vsync on Game Vsync off
Mouse starts moving = Frame 125
Movement on screen starts = Frame 143
Difference = 18 frames
Test9 OS Vsync on Game Vsync off
Mouse starts moving = Frame 303
Movement on screen starts = Frame 317
Difference = 14 frames
Test10 OS Vsync on Game Vsync off
Mouse starts moving = Frame 251
Movement on screen starts = Frame 269
Difference = 18 frames
Test11 OS Vsync on Game Vsync off
Mouse starts moving = Frame 231
Movement on screen starts = Frame 247
Difference = 16 frames
Test12 OS Vsync on Game Vsync off
Mouse starts moving = Frame 239
Movement on screen starts = Frame 258
Difference = 19 frames
KDE battlebit camera movement: (Fullscreen tearing enabled by default In wayland)
***OS Vsync off Game vsync on Avg: 43.5714285714 Frames
***OS Vsync off Game vsync off Avg: 15.4 Frames
***OS Vsync on Game vsync on Avg: 42 Frames
***OS Vsync on Game vsync off Avg: 15 Frames
Test1 OS Vsync off Game vsync on
Mouse starts moving = Frame 399
Movement on screen starts = Frame 441
Difference = 42 frames
Test2 OS Vsync off Game vsync on
Mouse starts moving = Frame 265
Movement on screen starts = Frame 311
Difference = 46 frames
Test3 OS Vsync off Game vsync on
Mouse starts moving = Frame 237
Movement on screen starts = Frame 281
Difference = 44 frames
Test4 OS Vsync off Game vsync on
Mouse starts moving = Frame 425
Movement on screen starts = Frame 469
Difference = 44 frames
Test5 OS Vsync off Game vsync on
Mouse starts moving = Frame 236
Movement on screen starts = Frame 279
Difference = 43 frames
Test6 OS Vsync off Game vsync on
Mouse starts moving = Frame 237
Movement on screen starts = Frame 279
Difference = 42 frames
Test7 OS Vsync off Game vsync on
Mouse starts moving = Frame 205
Movement on screen starts = Frame 249
Difference = 44 frames
Test8 OS Vsync off Game vsync off
Mouse starts moving = Frame 235
Movement on screen starts = Frame 251
Difference = 16 frames
Test9 OS Vsync off Game vsync off
Mouse starts moving = Frame 234
Movement on screen starts = Frame 249
Difference = 15 frames
Test10 OS Vsync off Game vsync off
Mouse starts moving = Frame 215
Movement on screen starts = Frame 233
Difference = 18 frames
Test11 OS Vsync off Game vsync off
Mouse starts moving = Frame 184
Movement on screen starts = Frame 195
Difference = 11 frames
Test12 OS Vsync off Game vsync off
Mouse starts moving = Frame 216
Movement on screen starts = Frame 233
Difference = 17 frames
***Performed to keep all things equal***
Test13 OS Vsync on Game vsync on
Mouse starts moving = Frame 261
Movement on screen starts = Frame 303
Difference = 42 frames
Test14 OS Vsync on Game vsync on
Mouse starts moving = Frame 161
Movement on screen starts = Frame 203
Difference = 42 frames
Test15 OS Vsync on Game vsync on
Mouse starts moving = Frame 209
Movement on screen starts = Frame 251
Difference = 42 frames
Test16 OS Vsync on Game vsync off
Mouse starts moving = Frame 203
Movement on screen starts = Frame 217
Difference = 14 frames
Test17 OS Vsync on Game vsync off
Mouse starts moving = Frame 209
Movement on screen starts = Frame 224
Difference = 15 frames
Test18 OS Vsync on Game vsync off
Mouse starts moving = Frame 231
Movement on screen starts = Frame 247
Difference = 16 frames