I'd side with Rundstedt myself, an officer with far greater experience of large scale formations than Rommel. Consider too that Rommel's plans were partly influenced by political considerations, whereas Rundstedt's were not. Rundstedt's plans involved the proper use of superior German armour, whereas Rommel's aim was to use them more piecemeal. I know Rommel seemed overly concerned with Allied air power, but being in range of Allied naval guns was not really helping matters. Guderian supporting Rundstedt is also another plus point. Guderian had his faults, but correct use of armour was not one of them.
Rommel in 1944 was just too politically motivated for his judgement to be taken purely for military grounds. Rundstedt, however, was a professional soldier right to the end.