Long time NWA now DL flier but could be making a career move that would involve frequent travel to and from Japan on ANA. As a USA based FF'er, would I be better off banking all my miles to my UA account or join ANAs program? The travel would essentially be a r/t to and from Japan per month in business class getting me quickly to Gold. Thoughts?

Unfortunately all my miles on UA have expired so I'd be building my account from 0 starting next week with a Y class trip to and from NRT. I have also lost my status at the new DL but have a handful of miles left after burning them, so no status match possible here.

I've had a look at those comparison charts someone so wonderfully put together, but honestly they don't make much sense to me!

Thanks!