$ Bottom line: Which one is better?
Bottom line: Canon EOS 70D is a better camera than Canon EOS 5D Mark II.
Canon EOS 70D is a better camera because of the following; 10 more focus points, has flip-out screen, 1.79× faster shooting at highest resolution with AF as JPEG format, 70 shots longer battery life, has WIFI, has AF tracking, 55g lighter and 13.18% higher resolution.
Canon EOS 5D Mark II vs Canon EOS 70D: DESIGN
Resolution; Canon EOS 5D Mark II has 1175 × 783px whereas Canon EOS 70D has 1250 × 833px
Pixel density; Canon EOS 5D Mark II has 471ppi while Canon EOS 70D has 501ppi.
Weather sealed; both phones are weather sealed.
Has a flip-out screen; Canon EOS 70D has a flip-out screen.
More viewfinder coverage; each camera has 98%
Dustproof and water resistant; Canon EOS 5D Mark II is dustproof and water resistant.
Bottom line: Canon EOS 70D is better in design as it has higher resolution, pixel density and has flip-out screen.
Canon EOS 5D Mark II vs Canon EOS 70D: OPTICS
AF tracking; Canon EOS 70D has AF tracking.
Focus points; Canon EOS 5D Mark II has 9 whereas Canon EOS 70D has 19.
Sensor size; Canon EOS 5D Mark II has 24 × 36mm whereas Canon EOS 70D has 22.5 × 15mm.
Maximum light sensitivity; Canon EOS 5D Mark II and Canon EOS 70D have maximum light sensitivities of 25600 ISO.
Phase detection autofocus for photos; Canon EOS 5D Mark II has this feature.
Megapixels; Canon EOS 5D Mark II has 21.1MP while Canon EOS 70D has 20.9MP.
Bottom line: Canon EOS 5D Mark II is a better camera in optics.
Canon EOS 5D Mark II vs Canon EOS 70D: VIDEOGRAPHY
In this review of Canon 70D vs 5D Mark II; the following can be compared of videography;
Video recording (main camera); Canon EOS 5D Mark II and Canon EOS 70D have 1080 × 30fps.
Phase detection autofocus for videos; Canon EOS 5D Mark II has this feature.
Continuous autofocus when recording movies; the two cameras have continuous autofocus when recording movies.
24P cinema mode; canon EOS 70D has a 24P cinema mode.
Bottom line: Canon EOS 5D Mark II has a phase detection autofocus when recording movies. Canon EOS 70D has a 24P cinema mode.
Canon EOS 5D Mark II vs Canon EOS 70D: AUDIO
Stereo microphone; both cameras have stereo microphones.
Microphone input; each camera has a microphone input.
Number of microphones; Canon EOS 5D Mark II has 2 microphones whereas Canon EOS 70D has just 1.
Bottom line: Canon EOS 5D Mark II is better in audio as it has 1 more microphone.
Canon EOS 5D Mark II vs Canon EOS 70D: BATTERY
Battery life (CIPA); Canon EOS 5D Mark II has 850shots whereas Canon EOS 70D has 920shots.
Battery power; each camera has battery power of 1800mAh.
Removable battery; the two cameras have removable batteries.
Battery level indicator; the two cameras have battery level indicators.
Rechargeable battery; both cameras have rechargeable batteries.
Bottom line: Canon EOS 70D is better as it has a better battery life.
Canon EOS 5D Mark II vs Canon EOS 70D: KEY FEATURES
Color depth; Canon EOS 5D Mark II has 23.7bits whereas Canon EOS 70D has 22.5bits
Dynamic range; Canon EOS Mark ii has 11.9Evs whereas Canon EOS 70D has 11.6Evs.
External memory; both cameras have external memory slots
WIFI; Canon EOS 70D has WIFI.
Remote control; each camera has a remote control.
Accelerometer; each camera has an accelerometer.
Bottom line: Canon EOS 70D is better as it has WIFI.
Conclusion
Canon EOS 70D is a better camera as it has superior features than Canon EOS 5D Mark II.