Hi Doug,
As Kissed Out mentioned I play out of the senior center, too and yes, it has two tables as described. It's very hard to compare the two tables as they both play differently; the older brunswick w/the RB cloth plays much shorter than the Gabriels w/the Simonis, but that is not because of the cloth difference necessarily as they are very different.
I will say that the RB cloth has held up really well and has kept its speed over the year+ it's been installed. I doubt the rumbling that KO mentioned on that table has anything to do w/the cloth, more to do with what was left under the cloth during installation. Could be the slate or stuff that was left due to not thoroughly cleaning the slate. The RB does create white spots easier than the Simonis, that's a fact. But it does not seem to change the performance, just cosmetic. Appears that it would last a little longer as well. It also feels pretty cool to the touch, I feel a little dirty when I play on it.
I contacted Michael Kang who owns Carom Cafe and he said he was experimenting w/the RB cloth and had several tables (not their main ones) covered w/RB and they liked it. Needed less heat as the blend of the RB does not absorb moisture like Simonis so for non-heated tables it would be a no brainer for me, and seems good on heated tables too, saving on electricity cause you could turn it down. He also mentioned about the white spots, but he liked the cloth.
Regarding cost, I totally agree w/Kissed Out that if you prefer Simonis, especially for a home table, the difference in cost should not be the reason you select one over the other. I mean a home table would not get used like a busy pool room would so either would last a very long time. But given all that I have heard about your table I think the RB would be a great choice. But there are no bad choices simply because you will have a nice 3C table in your home to enjoy.
Don't sweat the little stuff - simply hit 'em in the holes. Oh wait, that a different game, sorry. Hit 'em straight. I envy you.
Dave
Sorry, no installation tips from me, but I can make a natural.