2023 Altima vs q50

i have an altima 2023, ive never really been into cars so i just got that one since it seemed most reliable but lately ive been seeing a lot of q50s all which look very nice, however after looking into them they seem to be a little out of my budget, my question is would it be better to just modify my altima? a lot of people are telling so, since if i were to get a q50 i would have to go down to one from 2015 and i feel like it would cause some problems. i dont care about engine or anything that, i just care that it looks pretty