Thanks to its compression ratio, MP3 has always been the wiser choice, in my opinion. It keeps your game size small and, in many cases, game engines, like Phaser 3, import them quite easily.
It just depends on how much music you have in your game, and how much ambience is in the tracks. If you need something with high clarity and details, OGG is definitely your best bet. I would never recommend WAV for a game, due to its large file size and lack of fidelity (games tend to drop frames and, when they do, the music tends to stutter along with it).
Of course, I’m only speaking from my own experience. Your mileage may vary.