Minisplit wall mount vs floor mount – GreenBuildingAdvisor

Looking for some minisplit location feedback. We’re in Zone 5, so have many more heating days than cooling days. We have a well insulated (including slab on grade fully insulated concrete floor), less than 1 ACH50 envelope. Using a single minisplit to heat and cool the first floor. ERV supplies and returns located to promote cross flow across the spaces.

I have read where some recommend floor minisplit units in heating applications. However, the prices of the wall mount units are significantly lower.

In the attached image I have highlighted a location for a wall mounted unit as well as a floor mounted unit that would be tucked under the stairs. I’m curious if folks with more experience with the different types of units have feedback pro and con for either location.

Thanks!