Easy, option 2 gives heaps more options and positives and no real negatives if cost is same.
You could setup to run batteries switchable between together or separate, but battery use would not be equal if running separate.
I use 2 fridges, 60l single zone in ct and 92l dual compartment one in tug, gives me heaps of options.
We also cryovac and it is good, but having the freezer means changing meal plans is no issue and you can also carry some luxuries not available without a freezer, ice cream mmmmmmm, ice for drinks, etc. Not a need but a want, cooking and eating, to me is one of the fun things of camping.