Which video card is better

MSI Radeon R7 370 4GB Video Card or PowerColor Radeon R9 380 2GB PCS+ Video Card

The 380 without quesiton, also for 20 bucks more there are some 4gb 380s, but they probably aren't worth it really.

If you can wait and save up a bit more the 380X looks to be the card to get, it should be priced somewhere between the 380 and 390, but it'll have 6GBs of VRAM at stock

380 definitely.

On some reviews ive read they report that the 380 2gb cards stuttering can be seen on newer games, where as the 4gb cards run smoother.
So you mite wont to consider what Streetguru said.

Link on the stuttering issues
[Radeon R9 380 2GB vs 4GB review] The case for more VRAM becomes clear as two versions of the same GPU face off.

But overall the R9 380 performs why better then the R7, hardwarezone compares the ASUS Strix Radeon R7 370 4GB and Radeon R9 380 2GB against each other in the this link ..
ASUS Strix Radeon R7 370 and R9 380 reviewed

Only problems i can see with the 2gb card are newer games that need more ram with like the Middle-earth: Shadow of Mordor. but lowering the textures would help get the frames back up.

So i agree with the above, The R9 380 but desirably with 4gb

380 for sure. If you insist on a 370 snag a 7870 for $100. There is like a 3fps difference.