Intellect 4200's hands down.
More runtime,More Voltage and Lower Internal Resistance.
Make SURE you know how to care for them though.They are lil more fragile in the care department.
*****Look me up on Ebay. I will have alot of stuff going up as 7/7/2016. User name is Dalracer.**** This is going to be a BIG ONE!!!!!!
Just wanted to say Thanks to RcTech for all these years of Great Information.