As far as the differences between tireloc and secondair/staun are minimal... but I seem to remember a pirate thread that talked about them both. From what I remember, the secondair guys did essentially "steal" the design, but they did make a couple of minor improvements also... mainly related to trying to make them easier to inflate. Could be wrong. I'd run them on my rig for sure. Only thing I like about normal 2 piece double beadlocks over the Stauns would be the ease of mounting your own tires. That'd be kinda handy. They are heavy and spendy though... never a good combo.
The thing I am trying to figure out is why are the Stauns so $pendy? I'm almost sure I remember Second Air beadlocks being sold in australia for like $169 per wheel... AUSTRALIAN dollars. Now Staun wants $225-250 here in the USA? huh?
j