The cannondale metal one has less pleats than the scotts, I could count the pleats in the dale one when I get home but I would guess less than 12 where the scotts is more like 24. Means less capacity but then I think it is harder to clean the scotts and you cant see the junk as easy, but probably does filter more. When doing a fresh oil change I use the dale metal filter and at about ten hours I pull it and look at it and change to paper and go another ten. Brand new motor gets a paper for break in. Ten hours and the oil still looks like it came from the bottle so I cant see changing it... At twenty it starts to darken. So my answer is... use both.
It takes a long time to color synthetic oil. Do people realize how long 10-12 hours of ride time really is? I remember in the beginning that Yamaha recommended rebuilding the top end every 20 hours when the YFZ motors first came out.......
I own a filtration company and my opinion is the metal filter is more of of a strainer. As long as the paper pleats don't rip or tear the paper filter will filter the best. It will also clog faster due to the smaller micron size. People in my industry use the example of a human hair being 60-70 microns. The smaller the micron number the smaller the opening. More pleats mean more surface area and more flow. If you still have the metal filter keep it as an emergency spare.
I change my engine oil and filter after every major ride, usually about every 5 hours. The gear oil gets changed about every 10-15 hours. Call me anal, but I would rather be safe than sorry.
Is the EMGO part number available locally, or is it a special run that Dave, Brad, and ATK put together? I drained the oil out of 3 of the bikes this weekend, then realized I only have 1 filter. Always in the past I would have Dave throw a couple in with an order.