Yes, the GUI is larger. Much larger.
I have all the D16 effects and I agree that none of them are what I'd call best-in-class. The chorus doesn't come close to Ubermod, the distortion plugins aren't in the same class as Saturn, and Toraverb is no substitute for, well, any reverb.
But what they all offer is something that sounds
different from any of the alternatives I have in my toolbox. If Toraverb has been gathering dust on your disk drive, give it a try as a gated reverb effect on snares. I also like to put it on the drum distortion bus. It's also very good for recorded-in-the-bathroom type effects.