A question of Mdf?

[Millatime16]

Noticed when cutting small tables, the edges (even with a new bit) are very furry.

I know a compression bit is the answer but they are expensive and upper cut spirals have worked in the past.

Is it the quality of the mdf? It seems, the lighter colour it is, the better it cuts (or is that just a coincidence?)

Stuff from Builders yards, Wickes, B & Q seems to waver wildly in quality. Where do you get decent stuff at good prices?