Alfetta has a very sensible attitude to this in saying that opinions are bound to be subjective, depending on how comfortable one feels with particular cars. Even the same person can feel differently about the same car, depending on his/her mood and cumulated experience at a given moment in time!
Over time, I have been forced to radically change my attitude to quite a few of my own cars as I gradually discovered that some that I had considered to be superior (in my hands) were eventually surpassed by others that I had not previously felt comfortable with. This due to my developing a driving technique more suited to the more 'difficult' cars' requirements. A classic case was with unlimited F1s where, at first, I reckoned I would be more successful with a V12 powered car, because it was more predictable than its equivalent with a brutish SC07 in it. Luckily, I managed enough practice with both cars, prior to a big race, to make the risky decision that a more aggressive technique would enable me to get more out of the SC07. Good decision, as it annihilated the opposition! But it might not have on a different day and mood.
I would say that the Scalextric models mentioned here are so similar in performance that there is absolutely nothing to choose betwen them. Not sure about the others though.