I actually have both the K&N 0880 and AFE air filters. I just cleaned my AFE last weekend after spending 4th of July weekend visiting my folks in the Mojave desert and doing a little off-roading. It got a tad bit dusty and bug filled...
I used K&N cleaner and oil, haven't re-installed the AFE as yet, but I can't imagine there would be all that much difference.