For video encoding/decoding the 11th gen advantage is the newest quick sync hardware currently available. Unfortunately, its a bit too new right now, but its definitely better on paper. We just have to be patient for all the driver support to fully roll out! So yes, the iHD 750 is the BIG advantage. Other than that, there is nothing special about the 11th gen processors. i.e. They are hotter, slower, and less cores than their 10th gen counterparts. (14nm downgrade in process tech) So if you’re doing anything but video encoding/decoding, its actually a better buy to use a 10th gen processor right now to do anything else.
Here is a link with a nice chart showing the features of the latest quick sync hardware:
https://en.wikipedia.org/wiki/Intel_Quick_Sync_Video#Hardware_decoding_and_encoding