@LucidSFX
The basic sound is the same in spite of some golden eared folks whose ears think higher prices improves sound.
SQ has more better and useful compressor options. We do not use the SQ but wish we did for the compressor choices.
We do not use reverb with our Qu so not sure, but I think they have the same reverb, but SQ may have some more of those too.
The sales blurb on the site here should tell you such basic facts.
You should look at features and quantities to see which is best for your studio use.
The SQ is more flexible and if you are picky about reverb then that would be the one to go with.