There is 100% not that sort of difference between ducted and un ducted.
I have a friend with original ducted UF with a JetCat P-130 Rx (over 150N) that I’ve done a lot of formation flying with including competitions. We have had a few races with my JC P-130 Rx Evo and we can fly and turn together, we think maximum difference is less than 10 mph.