This video which claims to "proof" that the 109 was equivalent in turn to the spit is pretty much useless. The first interviewed guy never flew a spit as he admitted himself. The second guy we don't learn about his flight experiences. We therefore just learn that the 109 was a good turner (perhaps better than ingame but that's another discussion) and better turner than the P51. Now that is nothing new at all.

Fun to watch but not even anecdotical evidence on how close the Spit and the 109 were.