Difference between Samsung Galaxy Ace 3 S7275 and Samsung Galaxy Ace 4?

What is the difference between these two models? Which one is better?

I plan to buy a new phone, to replace my ZTE Blade III, which is lacking CPU power and memory. I wish a dual-core smartphone with 1GB memory, which will be reasonably fast in multititasking, light (<130g) and compact in size (~ <=120x60x10 mm). Nothing exceptional, no advanced gaming, not power using, just more or less simple using, but not to be slow when multitiasking, openening apps, etc. which annoys me with Blade III (and which due to 512MB, is always at 85-90 memory full).

And I don't plan to spent too much on something expensive and fancy. I chose S7275 as it seemed perfect for my needs (its only minor flow is lack of ambient light sensor), in that price range, but now I see Ace 4 and I'm not quite sure. What's more, it seems there are (at least) two versions of Ace 4, one having 1GB, and the other one just 512MB (a deal breaker), and I'm not sure which one...
npaunAsked:
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lherrouCommented:
I'd say go for the Ace 3, the specs are as good or better than the Ace 4 in most respects, except that the Ace 4 has Android v4.4.2 (KitKat) and the Ace 2 is 4.2 (Jellybean).

The 3G version of the Ace 4 has the 512MB of RAM, the 4G version of the Ace 4 and both 3G and 4G versions of the Ace 3 have 1GB. The 3G version of the Galaxy Ace 3 has 4GB of built in memory, the 4G version has 8GB. Both versions of the Ace 4 have 4GB. Only the 4G version of the Galaxy Ace 3 supports NFC (near-field communication).

That's about it. If the pricing is better, go for the 4G version of the Ace 4, otherwise go for the Ace 3.

Cheers,
LHerrou
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