User blog comment:Lasaro Ginjou/Gears to come.../@comment-27973430-20161017012120/@comment-5536072-20161023001806

I get it. But comparing Gears with Saiyan Forms is very wrong. Every saiyan form is simply the power level of the base form multiplied. ssj is x50 ssj2 is x100 and so on. In gears every gear has its own focus and unique skill set. Gear 2 is blood and speed. Gear 3 is bones and brute strength. Gear 4 is muscles and explosive strength. They are nothing alike. So you can't compare it like that.

And exactly because every gear focuses on a different quality and aspect of the body, having more gears mean that luffy devlopes even more aspects of his body through his devil fruit. Hence, he devolops his devil fruit.