Puffers Together?

Hi, I have a 55gal fowlr aquarium, though I'm going to upgrade to at least a 75gal in the next year. Anyway, I have a Canthigaster puffer in my tank with a Fiji blue damsel, a spotted grouper, and a snowflake eel. I was at my LFS today, and I saw a really cool juvinile dogface puffer. I know keeping two Arothron species together or two Canthigaster is bad, but I couldn't find anything about an Arothron and a canthigaster together. Does anybody have any experience with these two?
 
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