From what I can gather, the Fein has always been regarded as the flagship but I have only ever used "my first multi-tool" a cheap and cheerful 250w Worx from Argos. Its done everything I've needed it to from trimming skirtings, door frames, sanding, grout removal. I even took a 5mm strip off the bottom of a door with it when we had a carpet fitted but admit, it took a while. It was either that or a hand saw but decided you can't have a tool and not play with it....... (sounds wrong). I tested it when I first got it and was even able to put a bullnose on a piece of honed slate, using the standard sanding pads but I see now you can get the proper diamond pads for tile work.
It has the quick release for easily changing the open backed blades, however a little more fiddling is needed to use the Fein/Bosch type with the closed back. But thats the only drawback I've found so far. Although would probably up to a 350w if its going to get full-on daily use.