HI both units you are looking at have had good reputaions here. my dw and i have had several montana's and we loved them all. there are many satisfied cougar owners too. With that said really it comes down to which floor plan works best for you. if you can got to a dealer and ask to hang out in them for a bit. talk it over with your partner. then make your planes. just note both are built by humans and are subject to issues. some small some
Do your research on the dealer. a good deal is nothing with out good service. Also there is a stick on the pdi (predielivery inspection. print that out and take it with you when you pick out your unit. enjoy the life it's great!