Why would the tuning be good on one Baffetti but bad another?
I know a couple people that have the Latino IV. They got them from Larry Miller. I played them, and I wish I had one. I don't think you have to worry about the tuning.
The website mentions mussette for the GL boxes, and nothing at all for the Latino. Perhaps someone will have something I can lay my hands on at the Cotati Accordion festival coming up.
What did you have in mind as far as tuning? I can get them with musette tuning if that is what you are looking for. Baffetti offers MANY different tunings for the different generes of music.
I had a Baffetti GL IIA FBE, with LMMM reeds, purchased new from Larry Miller with internal mic back in the day. It weighed 18 lbs., significantly heavier than the Roland.