Between the 2, I would go with the 210. The 410 has the bezel that you can touch and I have used the 405 and can’t stand how touchy the bezel is while I am running. I currently use the 310XT and love it. I have also used the 305 and wouldn’t have sold it if the 310xt would have come out. I use the 310 with a cadence adapter that is on my bike and all I have to do is unclip the watch from the bike and clip it in to the wrist band. Hope this helps!