Yes there is a difference, the S3001 is a Ball bearing servo wich has less torque than the S3003 but it will do the job, because the difference is minimal and the handling of the Tiger 60 does not require a high torque servo in any surface.
If you already have 4 servos and need one more I will reccomend you to buy a Hitec HS475HB to control the rudder or elvator surface.