There are more detailed comparisons from makho’s Backlight Mod Notes. I have made some of them and there are huge differences:
|mod||Soldering||Custom Lens||Pixel Grid||Multi-Brightness||Adjust Potentiometer||Color Temp.||Power Consumption|
|IPS V2||optional||yes||no||optional button||no||neutral||high|
|Drop-in IPS||no||no||no||touch||no||cold||very high|
The FunnyPlaying ITA kit uses the DSi lower screen, which has the same display size and same resolution as AGS-101 but without ghosting, and with brighter better colors. I have been playing it quite often recently and satisfactory. However, it does require a bit of shell cutting also on the speaker side to host the screen ribon cable. Compared to IPS V2 the viewing angel is not that great and response time is a bit longer.
Besides the above differences, the kits also result in different weights being AGS-101 mod the heaviest > ITA > IPS V2 > Drop-in IPS.