Actually Whithin temptation was first, then came Evanescence. If you want my opinion: I dislike them both. Both bands are formed to satisfy teenagers that want to claim they listen to gothic music. No, there's nothing goth to both these bands... as a matter of fact, their beloved lady singers (who look pretty nice btw) both can't sing. It's just commercial music just like the rest of all the sh@t.
If you want Dutch goth music, check out The gathering. That's a real band.
I know many of these local bands, but to be honest, I don't think you're missing much; all they do is make as much noise as possible; every moron can do that