Spec-wise, the EOS-70D continues to be behind (unfortunately) in color depth, dyrnmaic range and low light ISO with the 5D3 being much better.
- Canon 70D. 22.5 bit color depth, 11.6Ev dynamic range, 926 low light ISO
- Nikon D7100. 24.2 bit color depth, 13.7Evs dynamic range, 1256 low light ISO
- Canon 5D Mark III. 24 bit, 11.7EV dynamic rang, 2293 ISO
- Nikon D800. 25.3 bits, 14.4EVs, 2853 low light Iso
When related to rivals, the new Canon’s scores look sub par. Compared with the $1,199 Nikon D7100 with its 24.1-MPix CMOS sensor the EOS 70D has -1.0 stop less Color Depth, -2.0 stops less in Dynamic Range and around -0.2 (1/5) stop less in Low-light ISO scores.
Pitched against the 2011, $1,098 Sony SLT Alpha 77 (again using a 24-MPix CMOS) the Canon is still behind except on Low-Light ISO where there’s an improvement. In real world terms, however, it would be very hard to see any difference.