I wanted to get away from a toad-mounted tow bar into a used coach-mounted one. Ended up with a Roadmaster Falcon All Terrain, and YES, it's easy to disconnect. The older toad-mounted one was often difficult.
While shopping and waiting for a used tow bar to pop up on ads, I did some on line research. I didn't look at Ready Brute and Elite, but in Roadmaster I saw the "aluminum" ones were not all that much lighter than all-steel ones. Without going back and looking, something like 10%. For me, not enough to pay much extra for aluminum or call steel a deal breaker.
There's still a lot of steel in an aluminum tow bar. That said, I'd believe their ARMS will feel noticeably lighter while you connect and disconnect a coach-mounted bar. Not only because the coach is balancing one end, but also because the coach end is massive and takes less advantage of aluminum in its coach mountings than it does in the arms.
If God's Your Co-Pilot Move Over, jd
2003 Jayco Escapade 31A on 2002 Ford E450 V10 4R100 218" WB