Yes, it's the same and the OWIN/Katana middleware can be interleaved at the same stanges in IIS as needed. Check the UseStageMarker API to let IIS know when you want the middleware to run:
Also, this goes into some details as well:
http://www.asp.net/aspnet/overview/owin-and-katana/owin-middleware-in-the-iis-integrated-pipeline