There are 3 types of frames used on these push carts, one of which is the lightest and most expensive, carbon fiber. The next lightest, and most underrated is the aluminum frame.
It’s significantly cheaper than the carbon fiber, not much dearer than the stainless steel, and definitely strong enough to keep you going.
That reduced weight of an aluminum frame is definitely beneficial if you’re not just playing the front 9. The carbon frame is capable of carrying a much bigger golf bag compared to the frame, but there’s nothing definitive to decide the golf push cart for you has a carbon frame, nor aluminum, nor stainless steel.