The EZ-B will power them but you get more out of them and avoid possible brownouts if you supply them with 6v, it depends on the robot at the end of the day, but supplying with 6v is pretty simple, I have covered it in my showcase for Melvin (I think it's called Project Hearoid) and plan to do a tutorial for a quick and easy method.

I have only used the MG995s so can't really compare them but I have no problems with the MG995s other than a browning out issue with the LCD screen (the EZ-B only supplies 5A I think, which was not enough for 2 servos and the LCD so I had to supply the power externally).

I found the post for Project Hearoid but couldn't easily find out how to power my servos with 6v instead of from the EZ-B.

If your battery is 6v then it's very simple, basically just take a +ve and ground from the battery to the servo.

If you use anything else you need a 6v regulated circuit, I use an Etronix regulator. This connects on to the battery, from that you can take it to a distribution block, strip board or whatever and then on the servo, connect the red & black (or whatever colours the vcc and ground are) to the 6v supply.

@feroze I would use alternative power like Rich is displaying on any high torque servo. You get much more holding power with 6 volts and there is the added benefit of keeping the brain of your robot , EZB, nice and cool.

HiTec Standard Karbonite Servo

I will use alternative power in the future, but for now I just got similar servos to the ones that came in the EZ-Robot kit. I compared the specs of the Hi-Tec servo with the Futuba s3003 and the specs were close to the same.

The torque at 4.8v was 42 for Hitec and 44 for Futuba. The speed was about the same too.

So I decided to go Hi-Tec servos because of prime shipping. They should work directly with the EZ-B right with no alternative power source. Also all standard servos should be the same size right? So these servos should fit the EZ-Bit mounts correct?