Hi!
I can check the results of first fav. versus second or third according to the Supertab divi. for place and win one minute before the jump (or ten min, or jumptime) for you to see what is the difference.
But if you bet on all races there is no point because as you know, you would lose, unless you have some selection process going.

On my own rating, betting second selections, on all tracks, all races all conditions, I would be down 1 to 2 % on outlay. I have worked out what tracks and classes "MY" rating works on, and I am doing quite well.
As to why it works on about 60% of tracks and not on others? I have no idea and given up trying to find a reason for it! Incidentally I do not take track conditions or barriers into account at all, seems to make no difference to strikerate or profit. Maybe other factors in my rating are overwhelming these?

Let me know if you want me to run the fav v. sec. for you. I can do it on the weekend.
Good luck.