I couldn’t distinguish a 1 from a 2, but I can spot the other models. Played a lot on 1-2, 3 models in pool halls. Never had a chance to play a 4, I own a 5, and tried the 6 floor sample at my local dealer.
From a player perspective I’d take any of them, but the flush pocket trim on the 4-6’s is vastly superior, and features like counters, builder plates and (especially ashtrays) on the rails are ok but ultimately get in the way.
I thought my dream GC was the 4 with the gloss black/nickel trim, but the gloss finish shows dirt and fingerprints too easily. I like the mahogany matte finish on my 5.