Tongue - he probably would want the HD tongue. It's CCM's version of the Supreme molded (ONE95) tongue. The Pro Lightweight is something very similar to a TotalONE tongue.
The air mesh option is exactly as it sounds. Graf used to offer it back in the day. I assume they have a grip liner of some sort that is offered at pro. I'm not at my desk so I'm doing this strictly off of memory.
Advanced facing is the entire boot, all in 1/4" increments. You have two forward options and one recessed option.
It's usually the next size up, unless you choose other and request 2 sizes up.