Not really sure but I think the digitata is more like a branch and the capricornis is flat like a plate.
My temp varies between 78-82 depending on the season and my heater hardly ever comes on. In the summer I have 2 more fans that come on when the lights come on to keep the temp down around 82 during the day.
I still have limpets, welks and gorilla crabs in my tank. Just never manage to get them. I see one of those fleshy limpets from time to time also.