2 to 1?....don't worry about it
Banker and Player will come up Natural 9 the same number of times overall so it doesn't matter which hand you bet. In other words the odds will be there for either betting spot. The reason for this is because your first 2 cards are "flopped" for both. The cards don't "know" which hand they are going to, if you can follow that.
As for the banker 6, just like in BJ, you most common 2 card hand is 16, and the banker almost always will stay with the 6, (only the 6 or 7 draw can make it to hit again). You will lose ten times as much when this happens as compared to the commission (commision being 1/20th and half payout being 10/20ths). Since you are still being commissioned on your banker payouts and no commision on your player bets. It is more favorable to bet the player, but your odds should still be a losing proposition. You need to make up about 2 - 2.5 percent, by betting player and thats a pretty tall order. I don't think the 2 to 1 Natural payout will help you all that much.