The O'Day 35 will do a horizon job on a Catalina 34.
I can't see how you can relate that a Cat-34 is fast.
I've always used the Catalina 34 as a benchmark for
slow in that size range.

"Maxprop" wrote
David--my boat is a rather traditional CCA-type boat of 34'. Two years
ago an Irwin Citation 31 (I think--I estimated it's length) passed us as
if we were sitting still when both of us were under auxiliary power--no
sails. Later the wind came up, we caught and passed it like it was sitting
still. Our boat is deceptively fast under sail; very similar to a Catalina
34. I really know nothing about the Citations, but they seem to be of
average speed under sail. They also all seem to be in rough shape around
here.