All I know about the seats is that the Russell adds some kind of a spring in the seat (this is what the girl on the phone told me at Russell) and is supposed to be the best for all day riding, from what I have read.
The Rick Mayer is the one I am getting, because reports I have read indicate it is well made and (looking at pictures) fits the styling of the bike better than the Russell. I am still about Form and Function I guess.
I know nothing about the other saddle you mentioned and this info is based strictly on opinion and things I have read so maybe you will get some more feedback to assist you. Once you commit, you can't go back so it's a tough decision.
Either way, I'm confident these will be better than the stock for longer rides.
I have a Bill Mayer saddle. Mostly, I chose Rocky cuz he's local to me and I really wanted to do a ride-in fitting. I'm glad I went the route because I believe the fitting makes all the difference in the world. Since, I've read of many of Rick's seats going back for adjustment and other minor service issues and I know of only one Rocky seat going back.
The other thing to consider is, Rick's business is a part time thing. IIRC, his main source of income is from being a nurse or such. Rocky's full time gig is in saddles with employees 'n stuff. Okay, he prolly makes a few bucks from all the avocados on his property, but they're pretty much a hands off crop until harvest.
Both Rocky's and Rick's seats are the outcast children of the Russell design. Their dad was the originator of the Day Long and sold that business years ago.
I rode up to Rocky Mayers' shop in Ojai for a custom fitted seat. Overall I'm pleased. No sore spots at all after a one day run from Monterey to San Diego. That speaks volumes since the single reason I (210 lbs/ 6'-2") got the new saddle was to be rid of the intolerable butt pain courtesy of the trash seat Yamaha ships with the FJR. It did take all day however for Rocky and his crew to actually get the seat somewhat customized (8am to 5pm). At the first test ride, there was still a tendancy to feel my crotch slipping into the tank, but after some serious foam carving, and numerous more rides, it began to fit. Not to pleasant riding back to SD but after about 500 miles it had softened up and retained some 'butt' memory. All is good. Highly recommended. Very nice guys to deal with. Down side: it looks like a cruiser saddle.
And I said Rick in my earlier post. Damn, gotta get my fingers to work right on the keyboard. I meant "Rocky" is the one I am having do my seat also. I have already spoken to him and filled out the form. Just need to get my pic taken and take some time off the FJR to let it happen.
I've had two seats from Rick M- completely happy with both. Like the look, feel, and service. Order went as promised. Rick gives a decent discount for LEOs and teachers- that's why I went with him initially.