I'll compare VTI (Vanguard Total Stock Market ETF) vs VOO (Vanguard S&P 500 ETF) — both Vanguard funds tracking U.S. large-cap equities, with VOO being a subset of VTI (S&P 500 only vs. the entire U.S. market). Let me pull the data.

VTI and VOO aren't in the local ticker database. Let me search for them to confirm the tickers.

Neither VTI nor VOO is available in the local ticker database, so I can't pull price history for either fund. Let me know which alternative you'd prefer:

• Qualitative comparison — expense ratios, tracking differences, total market vs. S&P 500 exposure, historical performance context from my knowledge.
• Substitute tickers that are in the database — e.g., I can compare two ETFs that overlap conceptually (such as a total-market fund and an S&P 500 fund) if you can suggest symbols you know are available, or I can check what's in the universe.

The available ticker list in this database skews toward individual equities rather than ETFs, so it's possible we don't have a direct like-for-like substitute. Which direction would you like?