Originally Posted by rmivuxgc
The major and visible difference is that 5830i has PROXIMITY SENSOR which is not there in 5830
Wrong, S5830 has a proximity sensor, each and every touch phone has a proximity sensor, without it, whenever you put your phone on your ears your face will touch the screen and press some button, might even end the call.
The basic difference between these two phone is that the S5830i has a different chipset, its the same as galaxy Y.
The S5830i does not have a dedicated GPU, so it might have some problems running high graphics games and apps. Its CPU has been given excessive speed and additional task to calculate for graphics, thats why its much more difficult to port or make an ICS rom for this model. The extra CPU speed does not helps in the phone's performance, instead it compensates for lack of a dedicated GPU.
In a developer's view(not me
), the only similarity between S5830 and S5830i except for looks is that they have the same name.
The chipset difference causes none of the available S5830 roms and mods to work on S5830i. Its more like galaxy Y than Ace.