Ron,

When comparing the 910D3 and 910D2 to the 905 S, you would have the model that mostly compares in playing characteristics.  If you are still trying to get the spin and launch down with the 910D3, you can always look to strong loft the club head by changing the setting.  Feel free to give us a call at 1-888-TITLEIST to discuss further. 

Cameron

1-888-TITLEIST 

Depending upon which way your ball flight is going (right to left or left to right), I would start with just one setting below your current one.  Meaning, if you are currently in A-1, then move to D-1.  

Cameron

1-888-TITLEIST