I have never tried FXRG boots. but I have both original SWAT and Cruiser Works. Original SWAT are definitely more comfortable if your going to do a lot of walking. I'm an MSF instructor, so I'm on my feet on hot asphalt for a good part of each coaching day, and the SWATs are the boot of choice for that. However, for riding, then walking around a rally or something, the Cruiser Works are plenty comfortable and definitely more waterproof, which is a huge plus. I find that they have a better grip on the pavement than the SWATs. I just had my Cruiser Works resoled and they are like new.
If I remember correctly, though, you can but three pair of original SWATs for the price of a pair of Cruiser Works.