I have used lots of Oxpho blue, but I've never used the Kleen bore stuff. I have tried something from Birchwood Casey that looks similar, I'm fairly happy with Oxpho, not so much with the others. The trick to Oxpho is to pour what you think you will need into a small glass and let it "breathe" for a few minutes-kinda gets the chemicals going a bit I guess. I've also found if you are fixing a gloss finish, put a coat or two more than what looks like enough, because you will need to buff it with 0000 steel wool and oil(I like Rem-oil)