The better bolstering is the main difference between the seats... I've found that the leather doesn't break-in as quickly as the cloth/leather variety. You end up feeling perched up on the full-leather seats a bit more for that reason... the new ST feels the same way. You feel like you sink into the ST2's cloth/leather seats, and the full-leather recaros feel like you sit on them.
Epic Mountain Cruise... coming soon; if you're Mid-Atlantic get ready!