I'm not a big guy so take my comments accordingly - the C2 is a big chunky pistol that is harder to conceal than a G19 or similar mid-size pistols. On-paper they might seem close; in reality, the C2 carries like a bigger gun.
I did the Extreme Shooters bobtail gripframe:
The Tactical is our most aggressive texture yet! Get a grip and let it rip in the rain or heat with sweaty palms and you will love how the Tactical texture stays firmly in your grasp. Featuring a full reduction, custom aggressive stipple texture, and a double undercut trigger guard. Tactical...
extremeshooters.com
This helped with the toughest area to conceal, which is the lower rear corner of the gripframe. It still feels like something best-carried under a hoodie or flannel shirt (so like eight months out of the year in the Midwest).
The C2 shoots really, really well. I ran it in my local indoor bullseye league last winter and it performed like a full-size pistol, because it pretty much is one.
The CS shoots almost as well because it's almost as big. I do feel more comfortable with it under a T-shirt than the C2, but the butt remains an issue because 16 rounds of double-stacked 9mm can only be made so short.
In summary, both of these pistols are great for those that put performance over concealment. Given the ignorant nature of the public, I don't think this is a problem, but there's no way I would attempt to sneak these past the watchful eye of someone that knows what they're doing. Also keep in mind that the bulk and weight can get uncomfortable over a full day. For all-day-every-day CCW, there's much to be said for a P365, G48, or similar.