Apologies for the no response. The construction of the two is the same, as are the materials. We have found the combination of materials we use in the TC and the TC MAX provide the sound and optimum ball speeds / performance we were looking for. The sound is an improvement, in my opinion, over the STA-2 that you have, although I didn’t find that one quite like a bell as you describe. It was louder though, than the TC or the TC MAX. The TC is 450cc which is ever so slightly smaller than the MAX at 460cc, but the MAX will look larger due to the stretched crown design vs the TC which has a more sloped crown. The MAX has a slightly higher MOI which could translate into more forgiveness, but the difference is slight. As far as spin rats, since both are adjustable, spin rate performance can vary from setting to setting, player to player, etc. In our testing at the standard settings, the MAX provided slightly more spin and slightly higher trajectory.
Hope this helps.