I like the rio material a lot; no kinks, reasonably soft and knots well.
As for the additional strength gained by switching to the florocarbon, it
doesnt add up - at least for me. NE saltwater flyfishing isnt normally a light
tackle sport. Your original leader was more than strong enough. Further,
I think the demands of a shorebound flyfisher place a premium
on the ability to cast a wide variety of flys, the ease of quickly releasing large numbers of smaller fish, and the abrasion resistance of the shock tippit.
For these reasons, I find it a lot easier to work with a reasonable hank
of mason or rio than to fuss with smaller dia monos or florocarbons.
If you're fishing brewster or monomoy flats, or bright light conditions or looking for bonita, then the florcarbon might have merit. Otherwise, save
your money - you'll switch flys faster, be able to turn over the occasional
popper or huge herring pattern and have something substantial to work with
when you unhook your schoolies.