I love the sub-c reps, don't get me wrong, but they are based on the GMT-IIc case and hands, which are not correct for the sub. The new sub case has noticeably thicker lugs and is not as tall/thick as the GMT-IIc. The sub-c does not have a maxi hour hand like the GMT-IIc has. Also, the bracelet links are thinner on the sub-c and have brushed sides.
Some of these differences are actually nice (i.e. thicker case, thicker bracelet and maxi hour hand), but take away from the accuracy. Personally, I'd love to just have the wider lugs and better hour markers (they are bigger on the gen and have much thinner metal/gold around them). Sure, it may not be totally accurate, but it would incorporate the things that are in my mind better about the gen while keeping the things I think are better about the rep intact. I don't care if I get called out, it would be a sweet rep!