It seems that killing cave spiders is easier than killing regular spiders to me. Is there a difference in the loot bonuses (mob spawners, mob crushers) or are they generally the same thing just in different areas?
According to the Minecraft wiki they do drop exactly the same thing. Their loot includes the following:
- 0-2 String
- 0-1 Spiders Eye
- 5 Experience
However, cave spiders have 12 points (6 hearts) of HP whereas spiders have 16 points (8 hearts), yet cave spiders are still poisonous. This is why it may seem easier to kill cave spiders.