The tool-end of the Metabo (Starmix) ASR 35 hose fits standard 27mm connections.
The vac-end of the Metabo (Starmix) ASR 35 hose has a proprietary twist-lock connection and DOES NOT work with Festool vacs.
The Grey Starmix hoses are non-antistatic, the red hoses are anti-static.
I have, for the most part, transitioned my company over to the Starmix vacs (mix of Mafell and Metabo livery), and generally use Festool hoses (27mm and 36mm), with Mirka tool-end ends on the 27mm hoses.
In my experience, the Starmix vacs offer the best combination of size and performance. Some folks are put-off by the filter cleaning mechanism, but I prefer it to vacs that "thump" the filter every 15 seconds, whether it needs it or not.
For what it's worth, if the Starmix vacs didn't exist I'd give a look at the Nilfisk/Makita/Milwaukee ATTIX vac. I have the Nilfisk and it's a solid performer.