I have a CT 235, and I also am very happy with it.
I have put over 60 hours on it in a little over a month, and it has done everything I asked it to.
A bigger sized frame would hinder me in a lot of ways, I have already had to trim up a lot of lower hanging branches that wanna smack me in the face, my ROP is already scraped up do to branches, turning radius is probably not as good ( I am not sure, as I never have looked into it), price is a little lower, but that wasnt the reason I bought mine, I just felt the frame size was more suited to my place.
I am not sure if the CT 335 has a stock cab, that would be a plus in the wintertime, but I am not so sure I would enjoy it much in the summer time, that s part of the joy on a tractor, the sun and wind on your face