I would judge cougar dating sites on whether the recommendations improve with use rather than on the feature list.
Took me about 6 weeks on cougar dating sites to work out that the real question was whether people reply or just collect matches.
Provided whether people reply or just collect matches holds up, it's a reasonable place to start.
What separates cougar dating sites from the rest of the field is how the match quality holds up past the first day.
Happy to go into more detail on cougar dating sites if it is useful.