How to Compare ETFs: A Step-by-Step Framework
VOO vs VTI? SCHD vs VYM? Here is a systematic framework for comparing any two ETFs and picking the right one.
Don't have time? Here's what you need to know:
- 1Compare ETFs on: holdings, fees, tax efficiency, liquidity, and performance (in that order)
- 2For the same index exposure, the cheapest ETF wins — every time
- 3Use etfrc.com to check holdings overlap between funds — above 70% means they are largely redundant
- 4Convenience of automation matters more than 0.01% fee differences
The 5-Step ETF Comparison Framework
When comparing two ETFs, evaluate these five dimensions in order of importance: (1) What does each fund hold? (different indices, different exposures), (2) What does each fund cost? (expense ratio is the most reliable performance predictor), (3) How do they differ in tax efficiency? (relevant for taxable accounts), (4) How liquid are they? (volume, spreads, AUM), (5) How have they performed historically? (least important for index funds tracking similar benchmarks).
- Step 1: Compare holdings — are they tracking the same market or different markets?
- Step 2: Compare fees — for the same exposure, the cheapest fund wins
- Step 3: Compare tax efficiency — capital gains distributions, dividend classification
- Step 4: Compare liquidity — volume, bid-ask spread, AUM
- Step 5: Compare performance — last and least important for index funds
Common ETF Comparisons
| Comparison | Key Difference | Winner For Buy-and-Hold |
|---|---|---|
| VOO vs VTI | 500 stocks vs 4,000+ | Tie — nearly identical returns, same fee |
| VOO vs SPY | 0.03% vs 0.0945% — same stocks | VOO (3x cheaper, same performance) |
| SCHD vs VYM | 100 quality dividends vs 450+ high-yield | SCHD (better screens, higher growth rate) |
| VTI vs ITOT | CRSP index vs S&P index | Tie — same fee, negligible index difference |
| BND vs AGG | Same index, same fee | Tie — interchangeable |
| VUG vs QQQ | Growth stocks vs Nasdaq 100 | VUG (0.04% vs 0.20% for similar exposure) |
Tools for Comparing ETFs
Use our ETF comparison tool for side-by-side analysis using total return data. ETF.com offers detailed holdings comparison and overlap analysis. ETF Research Center (etfrc.com) shows percentage overlap between any two funds. Morningstar provides in-depth fund analysis and factor exposure.
For most comparisons, the answer is simple: choose the fund with the lowest expense ratio tracking the broadest version of your target index. Performance follows fees more reliably than any other metric.
Tip: If two ETFs track similar indices at similar costs, pick the one your broker makes easiest to buy and automate. The convenience advantage of seamless auto-investing outweighs any 0.01% fee difference.
Want the full framework? This 2-hour ETF course teaches you exactly how to pick, buy, and hold profitable ETFs — from zero to confident investor. Under $15.
Frequently Asked Questions
Does past performance matter when comparing index ETFs?
Barely. Two ETFs tracking the same index will perform within 0.01-0.05% of each other annually. The only relevant performance comparison is tracking difference — how closely each fund follows its index. For index funds, expense ratio is a better predictor of future relative performance than past returns.
How do I check ETF overlap?
Use etfrc.com — enter any two ETF tickers and it shows the percentage of overlapping holdings and the correlation between returns. If overlap exceeds 70%, the two funds are largely redundant.
When should I switch from one ETF to another?
In tax-advantaged accounts: anytime a cheaper or better alternative appears (no tax consequences). In taxable accounts: only if the fee savings exceed the capital gains tax you would owe on selling. For small gains or a 0.01% fee difference, the tax cost usually is not worth it.
Further Reading
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Alex Harrington
CFA Level II Candidate, Finance & Economics
Alex Harrington is an independent ETF researcher and personal finance writer with over 8 years of experience analyzing exchange-traded funds. A CFA Level II candidate with a background in economics, Alex has reviewed 800+ ETFs and helped thousands of beginners build their first investment portfolios through clear, jargon-free education.
This content is for educational purposes only and does not constitute financial advice. Past performance does not guarantee future results. Consult a licensed financial advisor before making investment decisions.