« on: April 18, 2012, 10:46:28 PM »
I'm using both currently (5DM3 and 1DM4) the biggest complaint I have with the 5DM3 is the buffer as compared to the 1DM4 when I have to bury the shutter to cover a long play. You better be pretty selective on the 5DM3 instead of just burying it with the 1DM4.
Both focusing systems are impressive but the nod has to go to the 5DM3.
I do a lot performance photography where a silent shutter is preferred. 5DM3 is the landslide winner. You can barely hear the thing! The 1DM4 silent mode is practically as loud as the regular mode. Ugh.
If you need high ISO and performance the 5DM3 is the hands down winner.
If you need speed, power, and overall beefiness than the 1DM4 is your choice.
Luckily having both of them gives me tons of versatility.