I believe they are similar but I am pretty sure the fork tubes are a bigger diameter on the Wide Glide. The WG also has more rake but I believe it is in the frame but could be wrong on that.
The width between the forks the wide glide front end allows for fitting a wide front wheel
easiest way to tell is to look at the front fender if the mount arms are splayed out rather than straight down you will have a wide glide front end at one point it was only the wide glide and softail custom that came with a wide glide front end
if the front fender and wheel from an fl fits then it is a wide glide front end