Since Well and Well are actively-managed, you would lose all control about when the managers sold and realized gains. Also since they are balanced funds, you would have less chances of tax-loss-harvesting. Thus, TSM and TBM would be better from a tax-management standpoint.
If you want to be more like Well and Well, use Value Index and an Extended Duration bond fund instead of TSM/TBM, but also bail out of extended duration bond fund before it drops in value due to rise in interest rates.
You may have noticed that Well and Well will trail the performance of a small-cap and value-tilted slice-and-dice portfolio this year. This is because international equities have come on strong here the past 2 months while US equities have floundered. So if you are performance chasing, you would not go with Well and Well.
It's all about market timing, uh, I mean rebalancing, uh, I mean opportunistic rebalancing, uh, I mean short-term opportunistic rebalancing due to a short-term change in one's asset allocation.