Por 15 vs. KBS Rust Seal

I've had pretty good luck with POR so far, but then again I haven't tried anything else. Everything I buy for the car gets a coat now, lol. Bought it for the floor pan and underside of roof and have also painted the K frame and new rear end housing with what I had left over. Only problem is it keep self sealing all the cans / jars I put it in, lol. It seems like pretty tough stuff. It's got a funny slick texture to it, but it doesn't scratch up easy, so I've been pleased so far. We'll see how it holds up once I drive on the new rear end.