I just installed heated seats in my Wrangler, and had to remove a bunch of hog rings. I slipped a pair of needle nose expanding pliers in the ring, gave a squeeze, and the ring was open. Less chance of snipping the wrong thing, but if the ring was closed tightly this wouldn't be possible.
My go-to set of diagonal cutters is one I have from Proto. It's nice and thin, with a relatively shallow angle, but I had to plasti-dip the grips myself.
The secret to leverage in regular diagonal cutters (not compound; I can't stand spring loaded handles, or compound pliers, it's a personal issue), is how short the jaws are.
My Channellock's jaws are way too long, so you get no leverage out at the tip, and the closest the jaws get to the pivot point is double the distance from my Proto's, so for cutting wire at the inside of the jaws, the Proto has twice the leverage.