I've sailed both; I had an Inter 17 (EU spec) for 6 years - good boat, but VERY heavy to move around the boat park. The F16 (I have a stealth) is so much lighter it's a dream to move around.

Speed wise the F16 is a lot quicker, but compared with the US F17 there should be a lot less in it.

As others have said, the I17/F17/N17 rating is VERY suspect in the US.

I would LIKE to provide a SCHRS rating for it, but I have not been sent the data!