From a software standpoint, I'm not aware of anything on the 8000+AE2 that isn't in VMC1. VMC1 does have a few things not found in 8000+AE2, like 4 DDRs, NDI 8 way matrix output and that all media players and buffers are available as NDI sources (and I"m sure I'm missing things).
From a hardware standpoint, there are a few differences between the units.
TC8000 has analog I/O, AES I/O and removable drive bays.
VMC1 has 3G-SDI I/O, dual 1Gbit NICs, dual 10Gbit NICs and support for 4 monitors (1 Interface and 3 multiview).