We had a fiesta for a few years and loved it, both are made by pennine now, so you'll probably find them quite similar in terms of build quality and equipment, so it may just come down to which colour you you prefer!!
Love our Fiesta. Having a bed/sofa increases floor space and makes it easier to get into bed on the sofabed side. we just leave it as a bed. After all who wants to sit in the camper. I want to be outside or in the awning. There are three of us.
We have looked at both recently although we did eventually go for the Sterling as it was our personal choice. They are all equally as nice - I think it helps when you sit in them and get a feel of which you prefer. We have a friends who went for the Fiesta because it was just the right size for them to keep in their garage as they had a utility area in there also.
we have a fiesta,[bargain buy!!] ... but the way the countryman has covered the wheel arch by bigger boxing and making a bigger seat,[l/h side] makes it look more comfy, so much so as we are going to do a little convert to make it look that way, other than that the units are virtually indentical,
------------- That's not a dog....... That's a Schnauzer