Kayak differences

Planning ahead for possible gift and a better platform....it looks like most fishing specific kayaks are approx $400 or approx $1k.....other than being a little longer, they really look the same. Is there a $500 difference between say the lifetime 120 and the cabelas advanced angler?
I think my main concerns would be stability on wind driven lakes like Hattie and 11 mile and all day comfort/usability.
$400 feels do-able. A grand does not.