The mafell saw (MT55) has a black plastic filler strip that can be unscrewed from the baseplate to reveal the channel that rides along the protrusion on the Festool track. I'm not sure how close the blade comes to the splinterguard and whether it can be calibrated so it's identical to another saw. The bosch is probably similar, if you can get a photo of the baseplate and see that black filler strip secured with torx screws, that's it!
And you're correct, a Festool saw on Bosch/Mafell rails is a no-go.