Reinforced Bow:
Does slightly more damage than the vanilla bow and also has a little better durability.
Iron Bow:
Slightly more durable than the reinforced bow, does a little more damage and also has a slightly faster drawback as well.
Golden Bow:
Deals MASSIVE damage, has impresive drawback but the only downside is that it has really lame durability.
Crystal Bow:
The best bow in the mod so far. Really high damage, nearly twice bigger durability than the iron bow and very wuick drawback.
Flame Bow:
More Damage and same drawback as the Iron Bow, shoots flaming arrows.
The Creative Tab for the bows: