The D7100 is three years newer than the 7D. A better comparison for the D7100 will be Canons 70D when its announced.
Bodies: 6D, EOS-M
EF Lenses: 35mm f/2.0 IS, 100mm f/2.8L IS Macro, 135mm f/2.0L, 16-35mm f/4L IS, 24-70mm f/2.8L II, 70-200mm f/2.8L IS II; EF-M Lenses: 22 f/2, 18-55
Speedlites: ST-E3-RT, 600EX-RT (x3)