I wasn't able to find any threads concerning a direct comparison between these pedals? With all the great Black Friday deals online, currently, I considered upgrading to a set of one of these?
Weight-wise, they are spec'd as follows:
Dura-Ace 7900: 248 grams per pair
Ultegra 6700C: 258 grams per pair
Reviews on both are excellent! Is there any reason to spend the extra cash on the Dura-Ace? I'm currently riding Shimano 5700 pedals. Are the Q-factors similar to my current pedals?
Dimensionally, the q-factors are almost identical. I couldn't tell visually when I compared them by eye.
However, the stack height of the Ultegra is higher. ~2mm or so higher. Not much but noticeable if you do a blind test and swap between them.
The seal and bearing quality of the DA ones are far superior. Its just buttery smooth out of the box. The Ultegra is a little draggy out of the box. And as mentioned, the bearing arrangement on the DA is way better for long term use.