Infernape gets my vote. For the DW ability, I'd say Blaziken with Speed Boost because it's useful for it. But, Infernape has a good ability too. Infernape's Iron Fist will increase the power of punching moves and a good move for Infernape's moveset would be Thunder Punch since water type is weak to electric type and if you want to give Infernape Fire Punch, that's totally fine since Fire Punch is a good fire type move and will increase the power of punching moves. It'll increase fire type moves by Blaze anyway but just by a pinch. For the movepool, Infernape slightly. Most of Blaziken's strong moves either have low accuracy or recoil in it. But Infernape's moves are quite low on power. Infernape's strong moves have either recoil or a secondary effect but I would still recommend them in Infernape's moveset. Flame Wheel is not so bad but it would of been better if Infernape had Fire Punch in it's level up movepool. If counting Generation V, then Acrobatics isn't bad either. For stats, I'd pick Infernape since it's speed helps and it's attack stats aren't so bad either. Blaziken has high attack stats but it's speed stops it. The one that would be more useful would be Infernape thanks to it's speed. If the two were to fight a strong Pokemon between Blaziken and Infernape's speed, for example Salamence, then Infernape will have the better result.
What will Blaziken do? Blaziken picks Thunder Punch.
(Salamence attacks first since it's faster) Salamence used Zen Headbutt.
It's super effective on Blaziken! Blaziken fainted!
Result: Blaziken didn't do any damage to Salamence.
What will Infernape do? Infernape picks Thunder Punch
(Infernape goes first since it's faster) Infernape used Thunder Punch
(Salamence lost some of it's hp) Salamence used Zen Headbutt
It's super effective on Infernape! Infernape fainted!
Result: Salamence lost some of it's hp.
Overall who has the better result? Infernape.
In my opinion, in the anime, Infernape was a lot cooler than Blaziken. Especially when Blaze activated. Chimchar/Infernape is my favourite fire type starter overall and favourite starter in Sinnoh. But Torchic/Blaziken isn't my favourite Hoenn starter, it's Mudkip/Swampert. I like Infernape's design better too. If Infernape and Blaziken were to fight then Infernape might win if it has a flying move like Aerial Ace or Acrobatics. But if not, then Blaziken with Brave Bird.