MITRE WIZZ IS ACTUAL ANGE GRINDER, in video clip they cut mitre , i believe on ceramic tile (wich is soft) . With mitre wizz you don't see what you are doing, does it fit on any angle grinder? etc. etc.etc. I just realy want to try this new tool 🙂 , i think it has potential. It's only my opinionPerhaps I'm missing something here but the principle of both is broadly the same - a hand held tool for mitres.
Both look to be good options.