The Bird is a slightly dubious, but can often lead to wild, fun games with chances on both sides. Chance of a middle game checkmate? Very high.
The English generally leads to boring closed positions with lots of maneuvering where one side tries to win an extra pawn and win in 70 moves. Chance of a middle game checkmate? Fairly low.
So the Bird by a mile!
People argue endlessly over whether or not this or that opening is better than another when the Stockfish evaluation by the end of book moves is almost always within half a centipawn, so it really doesn't matter. You should choose an opening that fits your style of play and that you enjoy.
For a post beginner, I would rather recommend 1.f4.
Basically you have to learn playing an (admittedly complex) type of position (reversed Leningrad Dutch), plus FEW more lines to have a complete white repertoire.
On the other hand, after 1.c4 there are hundreds of transpositional possibilities.
And I wouldn't bother at all about % scores in databases, that stuff as early as move one is useful purely for statistical reasons.