W200 Compatible? Upstair and Downstair Thermostats

Hello All! Needing help since the compatibility website said my thermostats are not compatible but didn’t tell me why. I have two thermostats, one upstair and one downstair. Both are Honeywell T6 Pro Wifi version. Would love to know why mine is not compatible with the W200? I attached my pictures:

This one is upstair:

This one is downstair:

Thank you for your help!