250 SNGs, time to move up?

[SumZero]

I'm curious what people have found as the main difference (if any) between the $10 and the $5 10 player SNG at UB?

I'm thinking of moving up from $5 to the $10 (I play 3 tables at once if it makes a difference). In the $5 I've played 250 SNG and have finished:

37/33/29/34/30/27/23/13/12/12 which works out to ITM% of 40 and ROI of 24%.

What do people predict my ITM% and ROI would be at $10?