Your satisfaction with whatever you choose may have a lot to do with how you plan to make photographs. If you're shooting: in a studio, no more than a few yards from the car, no more than a couple of miles of flat terrain walking, or hiking for hours and climbing hills, the merits or lack thereof of your choice will become very apparent. You can infer the obvious from those choices, but the consequences will be dramatic if you make the wrong choice.
Of the two cameras you're considering, one is twice the weight of the other, but you don't seem to be regarding weight as a deciding factor as much as the availability of lensboards. If weight is not an issue, then get the sturdiest 'pod you can afford. Carbon fiber is wonderful for hiking, but exceedingly overpriced and unneccesary for the studio, and so on..... Good luck!