Call one of them and ask to speak to someone about the differences. They’ll probably be delighted to explain why theirs is the really good one. Then call the others and listen to them too.

Beware the Freudians!

For some reason I’m thinking of the prisoner’s dilemma… but when I try to deduce the connection I keep losing focus. You don’t happen to have a spare donut or a glass of milk, do you?