I have both i.Prestige MP and the IG Prestige MP. I play primarily with the IG now. In stock form, the weight distribution is a little different.
IG Prestige MP feels a little bit more head light, a little softer/flexible & sweet spot feels bigger to me. I added a little weight (2 grams) at 10/2 & its perfect for me but its different than the i.Prestige. The IG feels more comfortable for long matches.
i.Prestige feels more precise and crisp. I get slightly more power on my serve and groundies. Volleys feel more solid and stable.
I still prefer the IG for the comfort factor.
USPTA P1, 5x Head TGK 237.2, Technifibre NRG2 16, 55LBS
Gamma 2pt 6004 with Wise.