The Canon C710, C810 and C910 are identical machines. The only difference is a tag on the machine and the speed. If you bought a new one, you’d get a certificate that indicates what speed license you paid for. If you get the C810 it’s just a slowed down C910, no difference in quality. I found the POD feeder to be limited, not sure if the picture you posted is what you’re looking at, but I would not recommend that long POD feeder.
I didn’t like the C810 I had at all. The front to back registration was never consistent, you could get it spot on and then it would move, align again and it would move again. Color was good but it would shift during the run. I use a Duplo for short run slitting and scoring and the Canon left a load of toner on the rollers that had to be cleaned almost after every job. I went back to Xerox and in over 2 years I’ve cleaned the rollers on the Duplo maybe 3 times, so the Canon just can’t fuse the toner well. Tray switching was horrendous, it would pause almost 60 seconds every time a tray ran out and would pull the same stock weight from another tray. They did come out with a better 3 drawer feeder right after I bought mine, but I can’t speak for the reliability since I just had the long POD.
The only thing I liked about the C810 was having the ability to change the level of gloss. What they don’t tell you is that increasing the level of gloss will decrease the speed of the machine.