Attitude Shift = moderate RG, very clean up front with a fairly angular reaction, strong on the backend, may go too long on some conditions to carry the corner pins unless you really sand it down, and then it may burn up energy of course
Special Agent = super low RG, revs up really hard. Gets into a roll earlier, but still strong on the back, very versatile
Secret Agent = super low RG, but solid/pearl hybrid cover with a light particle load. The particle smooths out the reaction as well as giving a little more traction in oil, making it a good control ball, but not a lot of backend.
Also, you mentioned the 50' pattern they used to use in the Tournament of Champions. You don't want backend on that pattern. There just plain isn't room for much backend hook on that pattern. It's not a very heavy oil, just long. You want the ball to roll up kinda early really with more of a hook/set reaction.
