Those are Gavins quotes
Who better to compare the H16 with the F18?
Hobie 16 World Champion
Round Texal Champion on a Tiger.

My limited experience has shown me that when you get the real good 16 guys(not me) on the same course with the real good Tiger(F18) guys is that the Tigers pitchpole as much or more in big wind.

There are so many H16's out there that you will get a lot of not so good sailors on them.(causing more flips)
There doesn't seem to be a lot of bad sailors on F18's

This is my third season sailing with my now 11 year old daughter and we haven't flipped yet. (knocking on wood)
We also don't stay out in much more than 20 knots