I'm wondering the same thing. When I went to twins and the associated stubby AFE PG7 filter for space considerations, my silicon readings went up.
When I had the single turbo with Scotty 3 with UNI, my silicon numbers were great.
If the AFE PG7 and the UNI flow the same at the same pressure, I would rather go to the foam filter.
I believe that Scotty decided to get out of the diesel BOMBing business.