Spec sheets won't help you much. Listening to and twiddling with the units in question will help you a lot. Forming a relationship with someone who has some experience with this will also help you a lot.
In the lower-line channel strip category, I have yet to hear a "magic bullet" whose sound belies it's price. They're mostly a step up from typical Mackie preamps, but I haven't found one yet that shines above the others in the same category.
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Current live rig: Roland RD700SX, Hammond XK-3 with Leslie System 21, and Muse Receptor. Also a Nord Stage 76 other times instead. And a Roland FP-7 for jazz gigs.
HOME: Kawai MP8 + a bunch of VI's.