[K-Style]

I was planning on ordering a mouth guard from Jawzz after i read several positive reviews on here about them. I have been using a boil and bite shock doctor but they kept coming apart and sometime have trouble breathing with them. My question is I do bjj and muay thai. I was having trouble deciding if I should get one pro or get one pro and one adult. Is there that much of a difference in them? I do bjj tourney's and roll frequently so I wasn't sure if there would be a benefit to having the thinner of the two as well as the pro for sparring. Any suggestions? Thanks,