Grip - more conventional blade grind (assuming that you get the drop point version), axis lock is awesome. But it only has partial liners. If you're a lefty though this is a no-brainer, you'll be happier with the Grip as it's perfectly symmetrical in every respect and the clip is reversible (tip up only though)
Emerson - can't speak to the A100 but the CQC-7 is usually found with the chisel (asymmetric) ground tanto blade aka "B" version, I prefer clip or drop for EDC. The "A" version has a blade that looks like I'd like it better but I haven't seen one pop up used yet, all I've seen is the "B". But the textured G10 scales are fantastic. They look rather crude, but the Emerson totally out-grips a Grip. But it is apparently designed for right handers only - clip is right pocket tip up carry only and only one scale is cut out so you can flick open with your thumb, and above and beyond that it's a liner lock. There is a left handed version of the standard sized "B" model however if you're still leaning Emerson.
If you held the Grip and CQC-7B in front of me and told me I could only keep one, I'm pretty sure I'd reach for the Grip. I just got my Emerson (CQC-7B) today; it's great, but even with the shiny (well, not really, nothing about it is shiny) new toy effect, I'm still liking the Grip. It'd be a harder decision if I had a satin blade CQC-7A...
For opening I would call it a toss up, I prefer both the thumb studs (Grip) and screwed on washer (Emerson) to the Spyderco hole (heresy in some circles, but it's my preference) can't say that I really feel a real difference between the two.
really you're going to have to get down to the gun shop and handle them both.