Just for your information and the fact I didn't find this out till later is that although you have a 7.2V battery your receiver which delivers power to your servos are only rated at 6.0V so the 6.0V rating is what you get.....Now for servos I have used the 94357 it is a great servo and would still be in my car except I found one better and for the price & it is digital unlike the 94357 and I haven't found a single problem with it yet and that is the Ko Propo PDS 2343. There is a Ko Propo USA so yes you can get service if anything happens.
With the choices you have given I would say the 94357.
Hope this helps,
Stephen <><
PS I have a 94357 as a back up if something happens at the track.