Out of all the TAL reverbs, TAL Reverb II is the one I keep reaching for. It just has a great warm vintage vibe to it, and sounds lush and otherworldly; the mid range is very present and highs don't easily overpower. Evokes the late 70s/early 80s. The EQ section, while confusing at first, allows for a lot of subtle shaping, so it can be tuned to perfection.
The original TAL Reverb sounds vaguely similar to Reverb II, though it lacks the mid range lushness. It's either too dark or too bright, by comparison. The damper knob comes in handy, but it just lacks the shimmery magic touch that Reverb II has. It also seems to lack certain algorithmic sophistication; a bit more artificial than the rest. Still usable, just fairly average, although it's strictly 32-bit.
TAL Reverb III is the weakest entry, in my opinion. As someone separate from me described it: Tinny. It lacks mid range even more than Reverb 1, and its high end is overly airy. I almost get the impression that it's using a bandpass filter against my will. Furthermore, it sounds 'wavy', as if there's a hardcoded LFO modulating the pitch that can't be turned off. That said, it has an extremelylong decay time, and so might be useful as a character reverb to achieve a long, bright, exaggerated sound. It's not terrible, just not my type.
Finally, TAL Reverb 4. It's a high quality, unobtrusive and balanced reverb. It's bass/treble response is tight, and its brightness is very pleasant. Definitely evokes late 80s/early 90s. It doesn't have much mid range warmth, but it's way better than Reverb III. It's Diffuse knob can bring in some shimmering, but it doesn't quite reach the "hybrid delay-reverb" effect you get in Supermassive or Xhip Reverb. It also has a modulation section, if you want to wobble the pitch.
Here's the breakdown:
1. TAL Reverb II (for its vintage character and flexibility) 2. TAL Reverb 4 (for its simplicity and natural tone) 3. TAL Reverb (nothing special, just a baseline) 4. TAL Reverb III (its feedback-based design might displease some).