The standard high torque servo..... futaba S3010 $24.99
Speed: .20 sec/60° @ 4.8V and .16 sec/60° @ 6.0V
Torque: 72 oz-in @ 4.8V and 90 oz-in @ 6V
The standard high torque "digital" servo.....futaba S3152 $34.99
Speed: .22 sec/60° @ 4.8V, .18 sec/60° @ 6V
Torque: 69 oz-in @ 4.8V, 87 oz-in @ 6V
The digital servo will move the servo horn .02 of a second FASTER at 60 degrees than the non digital servo and will suck more juice from your receiver battery than the non digital servo.
For $10 less I'll wait for my non digital servo to get to 60 degrees when it feels like it rather than Pay $10 extra to get to that 60 degree point .02 hundreths of a sec. faster!