Best Answer: the ace just has a bigger and better screen otherwise they are both the same phones inside don't buy the galaxy y it cannot play games(incapable GPU) and also aftermarket roms cannot be made for it(cynagon mod , MIUI).If you do want to buy the ace buy ace duos or ace plus they are better.
also consider HTC explorer
X5 is the proper. similar CPU % as Ace, yet X5 have a more suitable effective GPU ( adreno 205, ace has adreno 2 hundred) and a more suitable effective exhibit (480x800, 3.7 inch, ~256 ppi, Ace: 320x480, 3.5 inch, ~100 sixty 5 ppi)
truth to be told both device sucks both are powered by old ARM11 cpu and old andreno 200 gpu.ive owned galaxy ace,its a very bad device.y is even worse.
id recommend galaxy s advance,xperia live with walkman,xperia go,htc desire c.