[Milwaukee teased a new tool for the M12 fuel line.]

Milwaukee does it right. They tend to offer less expensive kits with lets say 1 battery on more specialized tools for a cheaper price. Then they offer kits with compacts for the middle price, and then their top tier pricing has the XC batteries. Not to mention the bare tools options. I know a lot of companies offer simliar options, but it seems like Milwaukee does the best job of running the gambit. 

[Random Orbital sander or Palm Sander]

For the m12 stuff they added about 10 bucks to the price. The size increase for the M18 they kept the same price. 

[Milwaukee M12 Lithium-ion vs. M12 Red Lithium]

So it gets more confusing for everyone, Milwaukee is rolling out 2.0 and 4.0 XC M12 batteries.