Each subsequent component group level has better finish quality, construction, durability, weight savings and features/speeds. They cost more as you go down each column but all function very well for their intended tasks.

SunRace

MRX

Acera

Altus

Alivio

Deore

LX

XT

XTR

Tourney

Sora

Tiagra

105

Ultegra

Dura-Ace

Specifications subject to change without notice.