RA indexes outperformed by EV indexes

[Freightman]

Reread BJA3, pp. 375-377. You can't increase SCORE by simply switching the indices. It's assumed that, when you do, the betting ramp will change accordingly. If, instead, you keep the same bets, then it's the risk that will be lowered.

Don

To restate what Don has said except in a different way.
Theoretically, RA indices allow you to increase your max bet for the count in question. Practicality leaves you with the same max bet with that amount which theoretically would have been applied as an additional wager is now applied to reduce variance.