I was amazed to see that most of the 906s were not the -8 variant, they were clearly the car to be in which rather surprised me (as all races with porkas do...)
I heard somewhere that the 906-E is the easiest drive. I didn't think to test the other 906s. Maybe next time.
All 906`s except "e" model have fixed toe in values and playing with that you can adjust car behavior to suite your driving style.
For example: in 906/8 i was using softer compound front tires to have similar grip as i would have in 906e and different toe in (actually with toe out) ...
It`s difficult to tell what is better and more agile because car only reacts on your input.
If you want better initial turn in, you don`t need to bother with "e" model but if you want better front grip and you can live with slow turn in, you will pick "e" ... or softer front tires praying that they will last the distance.