The JW magic make up is almost identical to the M.Asam Magic Finish with one difference, the scent. The JW one smells like the rest of her Diamond range, nice enough fragrance but I prefer the M.Asam one because it has less smell to it. On the plus side JW comes in a tube, so more hygienic than the Magic Finish which comes in a tub. But I got a 70ml tub of the M.Asam one from Ideal World for less than the 30ml JW tube.
M.Asam is coming to qvc uk in the New Year, it'll be interesting to see if their prices go up.
The texture is a lot like a primer so if you need more coverage mineral powders apply well over the top of it (not tried with other cream foundations though. Talking of both brands, is it a German trait that both brands seem to bring out massive super-sizes of their face creams, like 200ml of a moisturiser. I'd get bored using one product for that long!