How does a CTS-3010 system differ from a CTS-30DD system?

How does a CTS-3010 system differ from a CTS-30DD system?

A.
Newer 7975 phone used in place of a 7970 phone

B.
Larger 70″ plasma displays used

C.
Projector replaced with a 40″ LCD display

D.
Faster, more efficient Codec used