LUNG vs INSP

For growth investors, Inspire Medical Systems, Inc.

(INSP) is the stronger pick with 13. 6% revenue growth year-over-year, versus 8. 0% for Pulmonx Corporation (LUNG). Inspire Medical Systems, Inc. (INSP) offers the better valuation at 9. 3x trailing P/E (24. 5x forward), making it the more compelling value choice. Analysts rate Inspire Medical Systems, Inc. (INSP) a "Hold" — based on 27 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.

Over the past 5 years, Inspire Medical Systems, Inc.

(INSP) delivered a total return of -76. 6%, compared to -97. 0% for Pulmonx Corporation (LUNG). Over 10 years, the gap is even starker: INSP returned +82. 4% versus LUNG's -96. 8%. 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), Inspire Medical Systems, Inc.

(INSP) is the lower-risk stock at 1. 27β versus Pulmonx Corporation's 2. 36β — meaning LUNG is approximately 86% more volatile than INSP relative to the S&P 500. On balance sheet safety, Inspire Medical Systems, Inc. (INSP) carries a lower debt/equity ratio of 4% versus 104% for Pulmonx Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Inspire Medical Systems, Inc.

(INSP) is pulling ahead at 13. 6% versus 8. 0% for Pulmonx Corporation (LUNG). On earnings-per-share growth, the picture is similar: Inspire Medical Systems, Inc. grew EPS 179. 4% year-over-year, compared to 7. 6% for Pulmonx Corporation. Over a 3-year CAGR, INSP leads at 30. 8% 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.

Inspire Medical Systems, Inc.

(INSP) is the more profitable company, earning 15. 9% net margin versus -59. 7% for Pulmonx Corporation — meaning it keeps 15. 9% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: INSP leads at 5. 6% versus -59. 3% for LUNG. At the gross margin level — before operating expenses — INSP leads at 85. 4%, 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.

None of the stocks in this comparison currently pay a material dividend.

All are effectively zero-yield and should be held for capital appreciation rather than income.

For long-horizon retirement investors, Inspire Medical Systems, Inc.

(INSP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 27)). Pulmonx Corporation (LUNG) carries a higher beta of 2. 36 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (INSP: +82. 4%, LUNG: -96. 8%), 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 Healthcare sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: LUNG is a small-cap quality compounder stock; INSP is a small-cap deep-value 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.