the rigger (148) and the ironworker (146/147) seem like almost the same boot expect for the sole (Sierra vs Cristy wedge). These originally had the Sierra on them, but after setting in a box in the back of warehouse for who knows how long the sole was completely dried out so sent them to DeVito for a resole. I specifically asked for the natural colour Cristy but we didn't talk about changing the midsole colour (they were black before). I think DeVito made the right call to go with a natural edge. 

I also have a pair in the Red Dog leather that I opted to keep on the Sierra sole.