Yep, I've been running the SuperTech filters on my 97 Evo. Back in 1996, I found by curiosity that the Fram PH3614 I had bought for a 87 Toyota 4x4 pickup fit on my 96 Sportster ... so I started researching the specs and found that they had the same ratings ... then I got my black 97 Road King and I thought that orange can would look good against a black and chrome engine so yep, I used a Fram filter a couple of times before learning of their construction.
Anyway, If you can get the same or better filtration for less money then why spend more for a filter than is necessary? ... Unless you prefer chrome, and then I'd still buy aftermarket for less money. Heck, if you use synthetic oil, either become an Amsoil dealer (I did) or get on their preferred customer list and buy their excellent filters and oil for less than what Harley sells their lesser quality but higher priced stuff for. I'd rather pay Amsoil retail prices and get better product before buying the way over priced Citgo and Champion Lab products that Harley sells. Harley's micron rating thing is just quoting certain specs without all the details which is no more than marketing designed to sell "their" filters. Put the money you save in gas, oil, tires, etc.
Yep, I'm an Amsoil dealer and I use a SuperTech oil filter on my Harley. Why? .. because of the cost to benefit ratio in my circumstances. If I was running 10K or more miles a year or if I had a larger bore engine or a hot running twin cam engine, I'd be using Amsoil oil. Since my engine is basically stock and I now only get to put around 5K a year on my bike, it's more cost/benefit effective to use mineral oil and change it twice a year...actually, I'm running a ARX treatment at present...love my Evo engine!