Right now, Makita's new brushless hammer drill has the highest torque ratings, even more than the m18 fuel. Not sure about the impact drivers, but honestly - all the brushless stuff is so strong, they will do anything you need. My m18 fuel 1/4" hex drive impact driver can remove the axle nuts from my Honda with a fresh battery..
Buy what you like, or for what other tools you plan on buying.. If going brushless, Milwaukee offers the most tools, and most other brushed tools have higher torque ratings than makita. However, makita has a lot more tools available, in many other areas of work like chain saws, string trimmers, and a lot more.. Both are built equally well. Both are highly respected names.. If you can't decided - pick your favorite color.. The only other thing makita offers over milwaukee is an adapter plate to run dual 18v batteries on some tools, like a circular saw, which will give you a much longer run time.
Here is the new Makita drill
And impact
The 3 speed makita brushless impact (not in this kit) has slightly more torque than the single speed in the video above..