VOO vs RSP: Essential Comparisons for S&P 500 Investors

When evaluating S&P 500 ETFs, the comparison between Vanguard’s VOO and Invesco’s RSP reveals two fundamentally different philosophies for tracking the same index. Though both hold identical underlying securities, their structural approaches create meaningful differences in cost, performance, and portfolio composition. Understanding these distinctions helps investors make informed decisions aligned with their goals and risk appetite.

Cost Structure: What You’ll Actually Pay

The expense ratio comparison tells the first story. VOO charges just 0.03% annually, while RSP costs 0.20% per year—a notable spread for long-term investors. On a $100,000 position, this translates to $20 more yearly for RSP, which compounds significantly over decades.

However, the comparison becomes more nuanced when dividend income enters the equation. RSP delivers a 1.64% dividend yield compared to VOO’s 1.13%, offering an additional income stream that partially offsets its higher fees. For income-focused investors, this yield premium may justify the cost differential.

The assets under management (AUM) tells another part of the comparison story: VOO manages $839 billion while RSP oversees $76 billion. This scale difference affects trading costs and fund efficiency, giving VOO a practical advantage.

Performance and Risk: Where the Differences Matter Most

The comparison of returns reveals VOO’s historical advantage. Over the trailing 12 months, VOO generated 16.88% in total returns versus RSP’s 11.10%—a substantial 5.78 percentage point gap. This extends to five-year performance: a $1,000 investment in VOO grew to $1,842, while the same amount in RSP reached $1,517.

Yet performance tells only part of the story. The comparison of drawdowns exposes the risk tradeoff. During the worst peak-to-trough decline over five years, VOO dropped 24.53% while RSP fell 21.39%. This 3.14 percentage point difference illustrates that VOO’s stronger returns came with greater volatility and downside exposure.

For investors comparing these metrics, the pattern becomes clear: VOO’s market-cap weighting concentrates returns in the largest winners but amplifies losses when those winners stumble.

Portfolio Construction: The Structural Comparison

The fundamental difference between these ETFs lies in how they weight their holdings. VOO follows traditional market-cap methodology, giving each stock a position size based on its total market value. This means larger companies occupy larger portfolio slots.

RSP takes an equal-weight approach, assigning each of the 500 constituents identical portfolio weight regardless of size. This structural decision creates dramatically different portfolios from the same index components.

VOO’s portfolio reflects tech dominance, with technology representing 35% of assets. Its top three holdings—Nvidia, Apple, and Microsoft—collectively account for just over 20% of the fund. Each individual stock in the top positions exceeds 6% of assets, creating meaningful single-stock risk.

RSP distributes holdings much more evenly. Technology comprises only 16% of the portfolio, with industrials at 15% and financial services at 14%. The comparison here is striking: RSP’s three largest positions total less than 1% of the fund, and no individual holding exceeds 0.3% of assets.

This comparison explains performance divergence. In periods when mega-cap tech thrives, VOO’s concentration delivers outsized gains. When those sectors weaken, RSP’s balanced exposure provides relative stability.

Choosing the Right Fund: A Comparison Framework for Investors

These ETFs cater to different investor philosophies and risk profiles. The comparison between them ultimately becomes a question: do you prefer concentration or diversification?

VOO suits investors who:

• Accept higher volatility for potential higher returns
• Believe mega-cap tech will continue outperforming
• Want the lowest cost possible with massive scale
• Prefer simplicity of traditional market-cap weighting
• Have high risk tolerance and long time horizons

RSP appeals to investors who:

• Prioritize downside protection and smoother returns
• Seek exposure to smaller and mid-cap names
• Want a more balanced sector mix
• Value dividend income above pure price appreciation
• Have moderate risk tolerance

The performance comparison shows VOO has outpaced RSP recently, but this comparison should not become the sole decision driver. Market leadership rotates. The sectors dominating today may underperform tomorrow. RSP’s structural approach hedges against single-sector dependency, while VOO bets heavily on tech’s continued relevance.

Both funds track the S&P 500 and both charge reasonable fees—even RSP’s 0.20% expense ratio is modest by industry standards. The real comparison involves matching fund structure to investment objectives. Income-focused investors might tolerate RSP’s higher fees for superior yield. Cost-conscious, tech-bullish investors will find VOO unbeatable. Those seeking portfolio balance and smoother returns should consider what RSP’s equal-weight comparison offers versus VOO’s concentrated approach.

The comparison also extends to your broader portfolio strategy. If you already hold concentrated tech positions elsewhere, RSP provides valuable diversification. If you want pure S&P 500 exposure at minimal cost, VOO’s scale and low fees are hard to beat. Neither choice is objectively superior—only optimal for different investors making different bets about future market movement.