1. Did you experience an increase or decrease (or no difference) in FPS? Approximately how many frames?
I have had no difference in fps, my fps ranks in 60-65
2. Are you crashing more or less (or no difference) in GT:MP than you were crashing in GTA:N?
i'm crashing way less than on GTA:N, i have been able to play 2 hours without problems
3. Are you having desync issues more or less (or no difference) in GT:MP than you were having in GTA:N?
In combat i have experienced a lot of desync's but generally its the same
4. Are there any more performance differences between GT:MP and GTA:N you'd like to point out?
The only difference i have had from switching to GT:MP is that i almost never crash, compared to GTA:N where i crashed almost every 30 minutes