Heaps of copycat Multi Tools around, I've owned and ultimately sold several of them, but while it was more expensive, the Fein is still the best one I've used and worth every cent. I'll never sell that one.
I haven't tried the Festool one however which does also look really good. I'm thinking of getting it in the cordless at some point.
I've tended to notice over the decades that copying a product AND the associated level of usability and quality usually doesn't result in a dramatic price reduction on an equal basis copy.
The price reduction usually takes the form of design or quality compromises that render it not worth it in many cases, except for those truly determined to save costs, at all costs.