First of all, I recommend the main article on Four Knights Game with 4.Bc4! Nxe4 5.Nxe4! d5 6.Bd3! dxe4 7.Bxe4! Bd6 8.Bxc6+! etc. by Yury V. Bukayev ( https://chessproblem.my-free-games.com/chess/games/ChessArticle.php?art=C55 )! Thus, White gets the advantage after 7...Bd6 8.Bxc6+!, and 7...Ne7 8.c3!, and 7...Nb4 8.a3!, and after other responses (you can find them in this article too). ChessCafe linked it in 2012 (see Abby Marshall's article "The Two Knights Defense, Center Fork Trick": "Pertinent responses").
The article is pure nonsense. He does think that white is slightly better here, really?
Even a kid would laugh at this evaluation. Due to the bishop pair and white's slight lack of development, Black is surely better, after either 10.Ne5 0-0 or 10.Nd2 0-0 (I see he doesn't consider at all castling for Black here- maybe he is referring to a game variant where castling is forbidden?).
Mr. Frendzas, you are a boor. I'll not discuss with boors. Here are my words for polite users: the move 9...e4 can't make Black's pawn structure normal, and the pair of Bishops isn't enough compensation for such pawn structure, you may try to refute these words, but with your enough long variations, please.
The only people who ever played this against me were noobs who got clobbered pretty quickly. Often they don't retreat the B to d3 and recapture, they "save" the knight and make me take the B. Their position usually falls apart pretty quickly. I played this at the chess club last night in fact.