Samsung galaxy s2 I9100
1.2Ghz dual core Exynox 4210.
Overheat easily.
Poor battery life. (Fixed with Android 2.3.5)
Fully run at 1.2 GHz CPU.
So far no apps/ games compatibility issue reported.
Better 3D performance.
Lot of custom firmware, kernel, modification, tweaks.
Normal text font in PAPAGO.
Perform better and less lag while browsing the Internet and score better when opening apps/multi tasking.

Samsung galaxy s2 I9100G
1.2Ghz dual core TI OMAP4430.
Doesn’t overheat easily.
Better battery life.
CPU capped at 1008 MHz.
Might have more apps/ games compatibility issue.Some games developed for GT-I9100 like Asphalt 6 can’t be launch on it.
Poorer 3D performance.
Not much custom firmware / modification.
Very small fonts size in PAPAGO
Might feel lag when opening up too many app compare to GT-I9100 model.

With reference from http://10division.com/samsung-galaxy-s2-gt...u-need-to-know/

This post has been edited by ryanboy91: Oct 28 2011, 07:17 PM

Sometimes we need to leave it to other to decide for it. But truthfully said, S2 non g more ppl wanted to buy.

not really old stock... depend on how... Me here still can find new stock non-g...