In my opinion, I wouldn't call this a variation of legalls, but its a quaint mate nonetheless.
Variation of (Legall's Mate)

Quaint-
strange, peculiar, or unusual in an interesting, pleasing, or amusing way
Sorry for my typo.

Nice ! I think is more a variation of the scholar's mate 4.Ne5 might be the best move if the game is very fast but it's not the best move available in the position because black can take the knight (and not the queen) with equal material.
Possible was 4.Bxf7 Kxf7 and 5.Ng5+ taking the bishop with extra pawn
I played this variation of the mate the other day. I love Legall's Mate when it's available to play I usually go for it. Greed is usually considered a good thing in the U.S., but I am learning it's devastating in Chess.