The RCGF 10 carb w/internal pump would be news to me. Where did you see that? RCGF USA website still showing single needle w/remote pump:
https://www.rcgfusa.com/rcgf-10cc-3

I currently have 2 10cc Evo engines, but I've had good luck with other small RCGF engines (20&26cc), and will likely pick up an RCGF10cc one of these days - to be able to satisfy my own curiosity regarding your question. Particularly interesting is RCGF is claiming it will swing a 14x6 - which is getting into 15cc territory as far as performance is concerned. The 10cc Evo does a nice job on a 13x6. I also believe rear intake reed valve engines generally handle better than the front intake rotary valve design. Whether or not that carries into the 10cc engines remains to be seen here.

Which one to get? I wish there were more user reports on the RCGF engine..... -Al