I don`t have a Dremel version but do have a Fein Multimaster.
I have tried the original Fein blades which are of course good quality but a bit expensive, Imperial blades which I found to be almost as good as Fein ones but a bit cheaper.
But now I use a brand called Krop which I get from Ebay (I am in the UK). They are very cheap if you buy them in packs of 10, they are almost exactly the same as the Imperial ones for quality at less than half the cost.
Not sure about the fitting on the Dremel but I found there are 2 types of connector on these copy blades one is a continuous ring the other is split part way around the ring (for DeWalt I think). Of the 2 types the consistent ring is far better, the other type seem to loosen and spread with use (I think its heat build up).
The Krop ones are great value for money, I have seen very similar blades under different brands too I think Saxton is one.
I really like the Japanese pattern blades for clean wood, but they disintegrate if they touch a nail on concrete.
Ollie