I'm not familiar with this grip, but some comfort grips have a small set hex screw (Ergon grips among others have this feature) that must be loosened. Then any standard grip removal procedure will work. I discourage the use of WD40 or other non-water soluable lubes if you are planning to reuse the grips as some grip materials can absorb enough lube to make it difficult to remount them later. I use my cleaner/degreaser which is half Simple Green, half water and just a bit of Dawn dish soap.

The air compressor trick works a treat. I tried it on a 1950s vintage Schwinn because I didn't want to risk damaging the grips. It took a couple of short blasts to get the first one loose, but the second grip shot off instantly.