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EXTREME is for mountain bikes: mountain bike needs something that can take lots of dust, and/or muddy slop being kicked up on the chain from the front wheel.
ABSOLUTE DRY is for the road bikes: Road bikes generally tend to pick up more dirt and dust from static discharge, so a thicker, dryer membrane is needed.
GOLD is for both mountain and road bikes. A universal dry lube suitable dry dust and protection from slightly wet conditions.
HOLY COW is a very settled wet lube that is as clean or cleaner than most dry lubes. Dirt and grit can be quickly wiped from the chain unlike a dry line.