Why would you frame it this way ? If you are to ignore all the other differences in proposals the difference in capacity is 1.7-2MB for Core vs 2MB for classic.... In other words shouldn't you revise your statements to discuss other differences because we clearly are supporting segwit with 1.7-2 MB? You really are losing a lot of credibility.
nah. segwit PROPOSES 1.7 equivelent worth of transactions... and then 2 months later bloat up transactions with more opcodes and features. bringing transactions per second back down..
EG
imagine that there are 2000 transactions potential for 1mb, thats 4000 potential for 2mb
with segwit its 3400 for 2 months and then 2000 once all their fiddly additions are added.
if you dont believe me. ask the dev's on IRC how many bytes are needed to add things like payment codes. how many bytes the ID is in the witness merkle to link back into the main merkle. (hint, its not less than 70 bytes)
however a 2mb+segwit is 4000 transactions + all the features