High-end Olhausen tables use 3 bolts per rail, with 1" slate.
High-end Connelly tables use 4 bolts per rail, with 1.25" slate.
I've owned both! I've set them both up and taken them down. Both were 9 foot tables. The Ollie had a pre-assembled one piece frame and 4 legs. It was rigid. The pocket cut-outs on the slates were weird. The corners were 4 5/8" and they DID NOT like crisply hit shots. The "rattle" myth is NOT a myth.
The Connelly was 6-legged and had 1 1/4" slates. I don't care what other people say, I preferred the thicker slates. The side and end frame members bolt into the corner legs. The two middle legs were really just for show. With the exception of the slate frames, which were particle board, EVERYTHING else was solid oak...oh, the blocking inside the legs was plywood.
The cushions on the Ollie were their Accu-fast brand and they were nice. The cushions on the Connelly were made in England(I can't remember the name [they were recently bought in by a larger company]) by the company that makes most of the cushions for the snooker tables around the world. They were individually dated. I liked them better than the Ollie. They seemed to have a more sophisticated response. Don't laugh. If you played them side by side, you would recognize the difference.
OH, and it's a big OH, my experience with Olhausen customer service was very negative. Also, their dark finishes FAIL quickly.
The Gold Crown/Diamond loyalty here is cooked in. I'd put a well set high end Connelly up against anybody, any time. They're built like a brick shithouse. They are simple, where others are complicated and they are low tech, which is wonderful.