Lead Screw vs Belt and Pinion

Hi,

I would like to build a 1500 mm Y-axis, a 1000 mm X-axis, and a 250 mm Z-axis. However, I have a question
regarding the belt and pinion vs using the C-Beam solution.

Belt and Pinon
How stable is the belt when cutting aluminum parts?
How likely is it to jump tooth positions?
What is the fastest achievable linear inches/second?
Does the belt stretch?
How likely is it to skip steps?

C-Beam
How stable is the C-Beam when cutting aluminum parts?
How likely is it to skip steps?...

Lead Screw vs Belt and Pinion