Yeah the differences between 2018 and 2019 CX-5 are a few. For example 2018 CX-5 Touring has 19* wheels but 2019 Touring changed back to 17*.
ColoradoDriver*s suggestion is great, Ypu have to set up your priority first then make your decision, as either way won*t be perfect. I*m the one tend to want specific features I want and would go and get it. Memory driver seat is the feature I really want, hence I*d get 2018 CX-5 GT with Premium package. But 2019 CX-5 GT without Premium Package has already included memory seat, thus I may consider 2019 CX-5 GT without package.
17" rims are where its at for this kind of ride IMO