YZ400F Question

I've got a 98 YZ400F that I'm putting back together. I had to replace the head and ended up getting a 2000 WR head. It came with the the cams and everything. My question is what difference there is between the WR and YZ

cams. I'm trying to decide which to put back in because they are both in good shape :cry::cry:

What kind of riding do you want to do with it? MX of offroad??

I would probably do more trails and the occational MX. Are the specs that different? I figured they would be fairly close. :cry:

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