Who wins?
Skeleton vs Wither
Wither wins 79% to 21%. 20 more put them in the same row. From Minecraft Mobs Tier List. Pick a side.
grumpy_pickle on Skeleton: bones for bonemeal and the skeleton spawner farms are great
crispy_badger_46 on Wither: summoning it in the Nether and fighting it for the beacon is the best endgame project in the game
Minecraft Mobs Tier List: the full ranking