I have not seen any. I recall from some time ago that the PTE had very low pressure drop across it with high volumes of air simulating a big turbo on the inlet side.
Being cynical, I suspect most intercoolers are just clones of another. People try to figure out how to make the biggest unit that will mount without much hassle on most cars and call it good. The biggest science is in the design of the end tanks. One is trying to get as even a flow as possible thru all the tubes in the core so we have to figure out how to distribute the air across the entire end of the core and get it to turn smoothly and flow at all points and that takes some science in the tank and inlet/outlet design.
Harry at PTE came out of Garrett just as did John Craig so I suspect he understands the theory and puts some effort into the thought of the design. Other guys have simply said copy that and make it bigger, I am guessing.
In the end, most of these probably have the capability to flow a lot better than 98% of the customers will ever approach so it may be somewhat a moot point.
Dan was running an old V4, the same ic that I put on my son's car, and touched the Nines. I guarantee that the PTC can flow more air. Tony DeQuick did have a lot of professional experience in the business and he did make a damn good unit given the materials that were available to work with in those days. If I recall correctly, he designed ic's and radiators for international harvester.
Point being that you will not be undergunned whichever way you go. Norbs, on the other hand, will need at least four of the them to achieve his goals.
