I was wondering if anyone could point out the differences between these two cherry rootstocks?

I've heard contradictory descriptions that Mahaleb produces early heavy bearing crops but then also that it takes as long as Mazzard. And how soon do you get fruit on Colt? Since both are "semi-dwarf", are there any special considerations to take into account when choosing between the two?

Here in Albuquerque, it seems that unless the rootstock is actually labeled (in which case it's Mazzard 90% of the time and has a Dave Wilson Nursery tag on it), the most popular rootstock is "semi-dwarf", so I assume it will either be Mahaleb or Colt. I've never seen dwarf cherry trees in any nursery, only Home Depot, and I wouldn't trust buying my trees from them.

So any pointers about these two rootstocks would be helpful.

Climate here is low humidity with temperate spring and hot summers. Soil is sandy and well-drained, more concern about drought than wet, heavy soil conditions.

Thanks,

Allen