More than the model, it depends on the airline how well they want to fit the interiors.
I'd agree that the airline remains the primary factor for First and Business Class. However, in the case of coach I'd say that the make, model, and
era tends to have a higher overall impact on the coach cabin hard product than the airline. For instance, from the mid-1990's through the mid-2000's the 777 provided the best coach product regardless of airline. They had the best entertainment with standard PTV's, live maps for the air show, power plugs for personal electronics, and best-in-class seat width and pitch.
Today the the 777 represents a poor cabin experience with extremely noisy engines, uncomfortably tight clearances, ugly florescent lighting, and outdated seat designs. These days the B787 and A380 offer the best coach product in my experience. Quieter engines, smoother ride, softer lighting, larger windows, more advanced AVOD, and improved seats that make the most of the limited pitch. Flying coach
after the deployment of PTV, live maps, and power plugs, but
before the seat pitch crunch is likely to have been the best overall coach flying experience that has ever been or will ever be.