Thinking of getting myself a new engine for my truggy... Im stuck between the ninja and Js....

What are the differences you guys have noticed between the 2 engines?? I know the ninja is OS quality, can the js be compared to the ninja as far as quality goes, or will I need to perform engine rebuild sooner?? What power differences are noticed, and how is the consuption between the two.

I currently run a picco p7-evo3, and it has great power, and I manage to get about 11-11,5 min runtime..... Will the upgrade be a big difference to the picco?