If my advantage is the same (say true count +4, 1.74%) in two different shoes, one shoe has one out of six played another with 4 out of six played, is my advantage the same (should my bet be the same) or not?
Yes, however deeper into the shoe you get some added benefit from the floating advantage effect...but this amount only to a few tenths of a percent and only in very deeply dealt shoes.
So, a True Count of +4 yeilds the same player advantage no matter where it occurs in the shoe.