AOS vs WSO vs GWW vs LII

For growth investors, W.

W. Grainger, Inc. (GWW) is the stronger pick with 4. 5% revenue growth year-over-year, versus -5. 0% for Watsco, Inc. (WSO). A. O. Smith Corporation (AOS) offers the better valuation at 15. 6x trailing P/E (15. 4x forward), making it the more compelling value choice. Analysts rate A. O. Smith Corporation (AOS) a "Hold" — based on 29 analyst ratings — the highest consensus in this comparison. The "better buy" depends entirely on your goals: growth investors should weight revenue trajectory, value investors should weight P/E and PEG, and income investors should weight dividend yield and streak.

On trailing P/E, A.

O. Smith Corporation (AOS) is the cheapest at 15. 6x versus Watsco, Inc. at 35. 0x. On forward P/E, A. O. Smith Corporation is actually cheaper at 15. 4x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Lennox International Inc. wins at 1. 13x versus Watsco, Inc. 's 2. 88x — a reasonable growth-adjusted valuation.

Over the past 5 years, W.

W. Grainger, Inc. (GWW) delivered a total return of +173. 2%, compared to -6. 5% for A. O. Smith Corporation (AOS). Over 10 years, the gap is even starker: GWW returned +463. 0% versus AOS's +81. 4%. Past returns do not guarantee future results, and the stock with the higher historical return may already have its best growth priced in.

By beta (market sensitivity over 5 years), A.

O. Smith Corporation (AOS) is the lower-risk stock at 0. 81β versus Lennox International Inc. 's 1. 23β — meaning LII is approximately 53% more volatile than AOS relative to the S&P 500. On balance sheet safety, A. O. Smith Corporation (AOS) carries a lower debt/equity ratio of 10% versus 177% for Lennox International Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), W.

W. Grainger, Inc. (GWW) is pulling ahead at 4. 5% versus -5. 0% for Watsco, Inc. (WSO). On earnings-per-share growth, the picture is similar: A. O. Smith Corporation grew EPS 6. 3% year-over-year, compared to -8. 6% for W. W. Grainger, Inc.. Over a 3-year CAGR, GWW leads at 5. 6% annualised revenue growth. Higher growth typically commands a higher valuation multiple — check whether the premium P/E or P/S is justified by the growth rate using the PEG ratio.

Lennox International Inc.

(LII) is the more profitable company, earning 15. 1% net margin versus 6. 9% for Watsco, Inc. — meaning it keeps 15. 1% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: LII leads at 19. 5% versus 9. 6% for WSO. At the gross margin level — before operating expenses — GWW leads at 39. 1%, reflecting greater pricing power or product mix advantage. Stronger margins indicate durable pricing power, lower cost of revenue, or higher mix of software/services. They are one of the clearest signs of business quality.

The PEG ratio (forward P/E divided by expected earnings growth rate) is the most precise measure of undervaluation relative to growth potential.

By this metric, Lennox International Inc. (LII) is the more undervalued stock at a PEG of 1. 13x versus Watsco, Inc. 's 2. 88x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, A. O. Smith Corporation (AOS) trades at 15. 4x forward P/E versus 34. 0x for Watsco, Inc. — 18. 6x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for AOS: 22. 9% to $74. 00.

All stocks in this comparison pay dividends.

Watsco, Inc. (WSO) offers the highest yield at 2. 9%, versus 0. 8% for W. W. Grainger, Inc. (GWW).

For long-horizon retirement investors, W.

W. Grainger, Inc. (GWW) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 89), 0. 8% yield, +463. 0% 10Y return). Both have compounded well over 10 years (GWW: +463. 0%, LII: +309. 4%), confirming both are viable long-term holds — but the lower-volatility option typically results in less emotional selling during corrections. Retirement portfolios generally favour predictability over maximum returns. Consult a financial advisor before making allocation decisions.

Both stocks operate in the Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: AOS is a small-cap deep-value stock; WSO is a mid-cap quality compounder stock; GWW is a mid-cap quality compounder stock; LII is a mid-cap quality compounder stock. These fundamental differences mean investors should not choose between them on a single metric — the "better stock" depends entirely on which of these characteristics aligns with your investment strategy.