New to the forum but was looking for some guidance. I currently have 2 zones/systems (1.5 ton & 2 ton) supporting my upstairs and master, respectively. The AC company I've been using for a while (and happy with) has quoted two options to upgrade.

Option1 (2) Trane XR15 (1.5 ton & 2 ton)
Option2 (1) Trane XL20i (4 ton) with seperate zone controls. The XL20i system is a few hundred less...

Is the XL20i designed to control two seperate zones with one outside unit and what are the pros/cons of the differnet options?