They are different. At the moment Q9 is the best solution (and maybe the only one) if you don't want to spend a lot.
I read several reviews about this console and it has a lot of problems (overheating, bad analog sticks, general instability, the usual not optimized firmware) so i decided to not buy this product.
RK3288 is a good SOC, i'm sure that JXD will implement this on JXDwhatyouwant, my concerns are about heating...i'm not sure if this SOC is designed for compact 7 inches handheld consoles.
I found out there are a lot of 9.7 tablets with this SOC with interesting features, so i'll probably pair a tablet like these with IPEGA 9023 controller (deadzone issue is the only one defect that i would like to see fixed in a "rev3" version)
Under 200 dollars/euros is the only acceptable solution (in my humble opinion).