Nice. Where did you buy it? Motorola was a major licensee of Apple and was permitted to sublicense to others such as Tatung, APC, Centralen Norrland, etc, so there were several makes with the same case but a different badge. The lack of badging here suggests it was sold in Europe by unauthorized resellers just after Apple decided to kill cloners: Motorola passed off all of their unsold computers to European vendors like Computer Warehouse and PowerCity (mentioned previously) for resale in overseas markets where Apple didn't have quite so much reach to be able to shut them down, at least not before they could clear out their stock. Sometimes the PowerCity badge doesn't stick very well (the models I found were too large for the recessed area so overlapped it) and have fallen off over the years. Really the only clue to their origin was the notice in German near the power supply.
Anyway it's basically a Power Mac 4400 internally: maybe slightly faster, maybe slightly slower, maybe with a couple extra PCI slots; it really depends on the specific configuration which you won't know unless you run TattleTech and/or open the case.