Yes, if you want Wifi, get it. When I mounted my camera on a helmet I became quite conscious of where I looked and how still I held my head because I was recording that view. With a helmet mount Wifi may be useful. On a recumbent I don't wear a helmet so my camera has a fixed bar mount. It records where I steer rather than where I look and there isn't much I can do about that.
The difference between a helmet mount and bar mount is interesting because a helmet mount influences where you look. At least it did with me.
The difference between a helmet mount and bar mount is interesting because a helmet mount influences where you look. At least it did with me.