Hi Doug, since most of the answers have been answered, I'll just fill in with my data.

How easy is it to right? I'm 75 kilos and never had any problem even in the light stuff.

Lots of sailors at my club sail the T4.9 recreationally. The hull volume is a little small for anything more than 2 adult sin my opinion, but then again if you wanted to be carrying more than that, you;d probably want a much bigger cat than a 16ft.

How does it compare to the Inter 17? I've sailed both and I find the T4.9 a more refined design. The 17 is a much heavier boat with much heavier loads on sheets, rigging, etc, whereas the loads on the T4.9 are much lower. Personally, I find myself sailing the T4.9 faster than I would be able to sail the Inter 17, fist because of my smaller physique and seocnd because I relate more to the overall design of the boat of a highly efficient platform with lower weights.