I have always wondered this myself, because I've heard that VTI is more tax efficient than VTSAX.
Have you actually heard that, or have you heard that ETFs are more tax efficient than mutual funds? Because, while that's true for ETFs/mutual funds from all other companies, it shouldn't be true for Vanguard given the patent they have that lets them flush capital gains from their ETFs in the same way that all companies do, but also flush them from mutual funds through the ETF, which other companies can't. Maybe your chart above is just showing the difference in expense ratio between VTI and VTSAX?
I have heard both--that ETFs are more tax efficient than mutual funds in general, and that at Vanguard it's possible that the mutual funds are just as tax efficient as mutual funds.
Per their description:
After-tax returns are quarter-end-adjusted for fees and loads, if applicable.I'm not knowledgeable enough to know all of the specific details that go into the tax liabilities of net redemptions/etc. of each. But when you look at both funds, there are very few/minor differences. Two differences are the 30 Day SEC yield and expense ratio which could affect the total return.
1.85% 30 day SEC Yield on VTI versus 1.84% on VTSAX.
.03% Fee on VTI versus .04% fee on VTSAX.
Overall, I don't think they're worth arguing about. Jim Collins suggests VTSAX even in taxable accounts, and he's researched it more than I likely ever will.