Roundel sizes have been standard for quite a few years now.
The seats are very similar, but not the same. They have different headrests (e82's only adjust up and down, and do not tilt, like on the e92), no netting on the back panel, different stitch pattern, and the side adjustable bolsters (on the sport seats) do not seem to adjust out as far on the e82. They look almost identical, and have identical controls.
Nice