I was thinking about the back and forth guncrasher and I were having about the A-26 in another thread and I started looking at it against the Tu-2 instead of against the Bf110G-2, Mosquito Mk VI and A-20G. While I am nothing remotely like an expert on the two aircraft, it seems to me that they are pretty competitive with one another. The A-26 would be faster, 355mph to 325 or 342mph for the Tu-2, and have better firepower, ten Browning .50s with lots of ammo to two 20mm ShVAK cannons with 100 or 200rpg, but the Tu-2 generally has a better climb rate listed in the sources I looked at, 2,300fpm to 2,000fpm, and would also have lower wing loading, 44.5lbs/sq.ft to 51.1lbs/sq.ft at normal loads. Bomb loads are useful for both being 6,000lbs for the A-26B and a bit over 8,000lbs for the Tu-2. Both were also supposed to be robust aircraft, though simply due to the weight of the aircraft the A-26 is likely tougher.
In AH the A-26 will likely be a perk bomber and after looking at the Tu-2's capabilities, it may end up being the bottom end perk bomber or another top end free bomber.
While I think using either as a fighter is silly, I do think that dogfights between the A-26B and Tu-2 would be fairly entertaining.