the literature I've seen online suggest the motors offer slightly improved efficiency, and I've seen a few users post that they feel/see a difference. - tho some people say they don't.
but I have no doubt that their better quality.
However, I'd personally feel it's not worth spending money in that direction - better to sink it into FPV, gimbals, tx, additional batteries and other gear that you'll see an immediate difference/enjoyment.