I've knocked myself out a few times so naturally a USCGA vest seems the safest. However, last time I fell I hit really hard and jacked myself up. Collapsed lung, broken ribs and scapula. Naturally a thicker vest seems better for protection, but I was just reading about how it actually creates a bigger impact (more buoyant, greater surface tension on the water). Rather than cutting through the water on the fall, you're stopped at the surface with greater force.
What is your experience? Are falls easier with a comp and am I dumb to consider one given I will likely end up knocked out again at some point?