VICS = NB1, butterflies sandwiched between the two pieces of the manifold
VTCS = NB2, butterflies at the intake runner that mate to the motor

There's another OE intake, but it was EU and Japanese domestic markets only; referred to as EUDM/JDM Squaretops.

For relative performance, here's how they stack up:
VICS = best all around intake, makes decent amount of torque
VTCS = used for emissions purposes, no real performance to speak of
Squaretop = higher peak HP at the expense of mid-range torque