Not IME…for most people in your situation, I would recommend Traditional Base. You just need to log the hours to build the base.
That said, given your limited time to train, I would agree with those who have recommended SSB vs. TB. With the number of hours you have available, Sweet Spot work will be more beneficial…and if you find the additional odd hour or two during the week to get some extra riding in, just do some Z2 / aerobic rides.