Riley and BCE are now the same company. As far as I can tell, they're using the BCE brand for pool tables and maybe lower-end snooker tables.
Is an Olhausen 12-footer likely to be as good as a Riley? I wouldn't think so. 12-foot Rileys have 1.75" slate, for one thing, and I don't see Olhausen doing that. Nor do I see Olhausen using steel rails (yes, I do know that not all Rileys use steel, either). In fact, the more I think about it there are several questions I'd ask Olhausen before I bought a snooker table from them: Is it set up for English or American snooker (I wouldn't assume English just because it's a 12-footer)? If it's for English snooker, do they use a good napped cloth, and which one? What is the actual slate thickness? Is it the proper height? There are probably others.
Make no mistake: I have absolutely nothing against Olhausen. I dealt with them off and on from their start in San Diego until their move to TN. In the early days when Butch and Donny were around the shop a lot, they came across as decent, hard working guys who wanted to build a good product at a reasonable price. As far as I'm concerned, they did, and I see no reason that should have changed after the move. I like their pool tables, and I'm still very pleased with the one I bought eight or nine years ago. But I can't imagine they build many snooker tables and I'd want to make sure we were all on the same page before I got one.