Deliverance
Your initial comparison was between 2 different types which also used 2 different systems; this is not what we are comparing here. Your example reminds me of the F4/Lightning difference. Thanks to its wide bore pipes etc the F4 could take on fuel at a far greater rate than the Victor wing pods could give it. So much so that it was an advantage to refuel Phantoms sequentially on the HDU rather than 2 at a time on the pods.
My guess would be that a F35A with a probe or one that has the boom receptacle would have a similar if not identical onload rate (limited by ac pipes etc). So to my limited AAR experience the Boom formation (pair , 4 ship etc) would only be able to great thru the tanker quicker if the ac could refuel at twice the Voyager pod rate (1250 kgs/min). Even then there would be 3 changeovers on the boom with a 4 ship as opposed to one on the 2 point tanker.