A 7GS10 will produce 8 GPM from 260’ and 40 PSI. If the water level pulls down to 400’, you will only be getting 4 GPM at 40 PSI.
Franklin motors are now made in Mexico, and have been cheapened up so much in the last few years that I am not sure they are any better than others.
I also prefer three wire motors but, the cap run control box is only going to make it about 6% more efficient, the same as power factor correction usually does. This is not going to make much difference unless you use the well to feed a heat pump or lots of irrigation. For the small amount of water used by just a house, the 6% won’t even be noticeable.