I went recently with the 350 just because it was a little faster and I didn't notice any difference going from a 7" to a 6" brace. BTW, I'm a 28" draw. Now, keep in mind that I haven't shot it past 60 yrds, yet. Haha, maybe I'll be wishin' for that 7" brace, again. Anyway, for me speed was a priority because I went to a single pin sight and wanted to minimize my arrow drop as much as possible.