Jumbo would give you [up to] 6 times less packets for the same bandwidth => 6 times less overhead on the packet processing.
BIG TCP could give up to 123 times less packets (only theoretically, of course) but surely would dramatically lower the processing overhead for the big payloads.
9000 / 1500 = 6
> Enabling a packet size of 185,000 bytes
185000 / 1500 = 123.3
Jumbo would give you [up to] 6 times less packets for the same bandwidth => 6 times less overhead on the packet processing.
BIG TCP could give up to 123 times less packets (only theoretically, of course) but surely would dramatically lower the processing overhead for the big payloads.