Infernape is awesomeness. MY personal fave. With Iron Fist powering up its Water Coverage (ahem Thunderpunch) and Fire Punch STAB and Iron Fist it's got a reason to be called Infernrape. A sash + Swords Dance is serious Trouble. True you can't switch, but you are fast and you have Iron Fist and +2 attack on all your moves. It's unlikely your opponent resists all your moves. Be cautious, this is my set ;D (The last one I use is Close Combat)
Emboar has a nice Scarf set, and he gets Flare Blitz, Wild Charge, Head Smash, AND Reckless to top it off. Problem with Emboar is that he's missing the one thing Infernrape has- Base Speed. That's why he needs a Scarf, and that means no variety. However you could save him for a later time in most situations unlike Infernape. He has Pretty good HP. His Base Stats closely resemble Hariyama's- except the HP is a bit lower.
Important: Reckless Emboar is banned on Showdown, but not PO. We will just have to wait until it is released to unban.
They both have their awesome parts. But I find Infernape more fun to have. That's just my opinion; choose your Pokemon wisely. GL ATD! :D