I think I understand the query.
It has to do with the differences between a 10 handed game, and a 6 handed, 4 handed, HU, etc. I think this because most position strategy deals with number of players YET TO ACT, and the hand/card odds
at any position.
I think you drop UTG, UTG+1, etc from your starting hand equations. The names will remain, but your strategy will shift.
So at a 6 handed game, you will have SB,BB, UTG, MP, CO, Button.
However the UTG might be playing hands that in a 10 handed game would be played from MP or CO.
This is something I have wondered about, and thought about, and have so far found no really good readings about. In your case you are wondering about the dynamics of a cash game table (at least I think you are), whereas in my case it would be for tourney related, and final table related thinking.
Similar concepts though.