so if I follow what you're say, one cab will have 16ohm V30's and the other 8ohm V30's ?
what effect does that have on the sound ?
8ohm V30's should sound the same as 16ohm V30s'
BUT ..... Your amp will sound different at through it's 16ohm tap into a 16ohm load compared to through its 8 ohm tap into an 8ohm load.
I would recommend using all the windings of the OT, and using the 16ohm tap if it is available. With some amps it is reported to make little difference. With others, many folks claim to like the higher load better.
Whatever you choose, please match the cabinet load to the the ohmage required by the amp speaker output that you are using. That is unless you don't mind risking frying your amp.