If the Milestone 1 side gets most votes:

peppertux-old will be revived as slopes wont be needed anymore and the game will look like SuperTux Milestone 1 but with 4 main worlds (1 secret world)

If the Milestone 2 (0.3.3 to 0.5.1) side gets most votes:

peppertux-godot will continue as the new version of PepperTux and the game will look like SuperTux Milestone 2 but with 4 main worlds (1 secret world)

If both sides get the same amount of votes:

Both peppertux-old (now named peppertux-haxe) and peppertux-godot will be worked on at the same time (Not really fully at the same time, while I do have 2 computers I dont have 4 arms and 4 hands)

Both sides have good things and bad things, probably the same amount of good and bad things for each side.