Husqvarna mc2 vs mc4

I'm getting to figure out if it is worth paying $1000 for the mc4 vs the mc2. When I look at the specs online, they both have the same shock and fork, the motor has similar power, 4 piston brakes on both, 10 speed on both, and while one is carbon and the other aluminum, it doesn't seem like the mc4 is so much lighter than the mc2. Does anyone have an opinion, or may be some long term experience with them?