MASS vs MASI vs WAT vs A vs TMO

For growth investors, Waters Corporation (WAT) is the stronger pick with 7.

0% revenue growth year-over-year, versus -27. 1% for Masimo Corporation (MASI). 908 Devices Inc. (MASS) offers the better valuation at 15. 0x trailing P/E, making it the more compelling value choice. Analysts rate 908 Devices Inc. (MASS) a "Buy" — based on 5 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, 908 Devices Inc.

(MASS) is the cheapest at 15. 0x versus Waters Corporation at 32. 6x. On forward P/E, Thermo Fisher Scientific Inc. is actually cheaper at 19. 1x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Agilent Technologies, Inc. wins at 1. 35x versus Thermo Fisher Scientific Inc. 's 9. 05x — a reasonable growth-adjusted valuation.

Over the past 5 years, Waters Corporation (WAT) delivered a total return of +11.

3%, compared to -84. 0% for 908 Devices Inc. (MASS). Over 10 years, the gap is even starker: MASI returned +282. 9% versus MASS's -83. 5%. 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), Masimo Corporation (MASI) is the lower-risk stock at 0.

63β versus 908 Devices Inc. 's 1. 38β — meaning MASS is approximately 120% more volatile than MASI relative to the S&P 500. On balance sheet safety, 908 Devices Inc. (MASS) carries a lower debt/equity ratio of 12% versus 78% for Masimo Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Waters Corporation (WAT) is pulling ahead at 7.

0% versus -27. 1% for Masimo Corporation (MASI). On earnings-per-share growth, the picture is similar: 908 Devices Inc. grew EPS 125. 5% year-over-year, compared to 0. 5% for Waters Corporation. Over a 3-year CAGR, MASS leads at 6. 3% 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.

908 Devices Inc.

(MASS) is the more profitable company, earning 34. 7% net margin versus -9. 9% for Masimo Corporation — meaning it keeps 34. 7% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: WAT leads at 28. 2% versus -70. 1% for MASS. At the gross margin level — before operating expenses — MASI leads at 61. 9%, 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, Agilent Technologies, Inc. (A) is the more undervalued stock at a PEG of 1. 35x versus Thermo Fisher Scientific Inc. 's 9. 05x. A PEG below 1. 5 suggests fair-to-attractive pricing relative to expected growth. On forward earnings alone, Thermo Fisher Scientific Inc. (TMO) trades at 19. 1x forward P/E versus 32. 5x for Masimo Corporation — 13. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for A: 39. 9% to $166. 00.

In this comparison, A (0.

8% yield), TMO (0. 4% yield) pay a dividend. MASS, MASI, WAT do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Masimo Corporation (MASI) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

63), +282. 9% 10Y return). Both have compounded well over 10 years (MASI: +282. 9%, MASS: -83. 5%), 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: MASS is a small-cap deep-value stock; MASI is a small-cap quality compounder stock; WAT is a mid-cap quality compounder stock; A is a mid-cap quality compounder stock; TMO is a mid-cap quality compounder stock. A pays a dividend while MASS, MASI, WAT, TMO do not, making them suitable for different income and tax situations. 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.