Nope, they are not all created equal. Some are faster, others are slower. Some have more torque, others less. JR, Futaba, Hitec, and Airtronics all make good servos, although occasionally, one hears about a particular model that turns out to be a dog. For a .60 size warbird that's not going to be flown hard, a slightly higher torque, standard size servo would be ok. These same servos would do fine in a .40 or .60 size trainer that one would build before even considering a warbird.