they're both yamaha custom models (although they aren't actually custom-made). yas 82z is the model that Phil Woods plays and a lot of people like it. yas 875 EX is the new yas 875 model and is slightly more expensive than 82z. although lacquer is highly subjective, you can get both models in reg lacq, black/gold lacq, silver plate, and for the 82z you can get the unlacq. 62 II, 82Z, 875 EX use the same neck (G1). 62 II is a very good value for professional saxophone. 82Z and 875 EX and 62 II are very similar to one another. *A word to note: the mouthpiece that comes with these sax are only slightly better than student model mouthpiece so I'd recommend allotting some money to get a good mouthpiece if you don't have a good mouthpiece already.