RR vs IRBT vs ISRG vs NVDA

For growth investors, NVIDIA Corporation (NVDA) is the stronger pick with 65.

5% revenue growth year-over-year, versus -23. 4% for iRobot Corporation (IRBT). NVIDIA Corporation (NVDA) offers the better valuation at 43. 9x trailing P/E (26. 0x forward), making it the more compelling value choice. Analysts rate Richtech Robotics Inc. Class B Common Stock (RR) a "Buy" — based on 2 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, NVIDIA Corporation (NVDA) is the cheapest at 43.

9x versus Intuitive Surgical, Inc. at 57. 2x. On forward P/E, NVIDIA Corporation is actually cheaper at 26. 0x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: NVIDIA Corporation wins at 0. 27x versus Intuitive Surgical, Inc. 's 1. 99x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, NVIDIA Corporation (NVDA) delivered a total return of +1409%, compared to -99.

9% for iRobot Corporation (IRBT). Over 10 years, the gap is even starker: NVDA returned +243. 2% versus IRBT's -99. 9%. 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), Intuitive Surgical, Inc.

(ISRG) is the lower-risk stock at 1. 00β versus iRobot Corporation's 5. 31β — meaning IRBT is approximately 432% more volatile than ISRG relative to the S&P 500. On balance sheet safety, Richtech Robotics Inc. Class B Common Stock (RR) carries a lower debt/equity ratio of 0% versus 4% for iRobot Corporation — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), NVIDIA Corporation (NVDA) is pulling ahead at 65.

5% versus -23. 4% for iRobot Corporation (IRBT). On earnings-per-share growth, the picture is similar: NVIDIA Corporation grew EPS 66. 7% year-over-year, compared to -8. 3% for Richtech Robotics Inc. Class B Common Stock. Over a 3-year CAGR, NVDA leads at 100. 0% 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.

NVIDIA Corporation (NVDA) is the more profitable company, earning 55.

6% net margin versus -312. 3% for Richtech Robotics Inc. Class B Common Stock — meaning it keeps 55. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: NVDA leads at 60. 4% versus -355. 7% for RR. At the gross margin level — before operating expenses — NVDA leads at 71. 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, NVIDIA Corporation (NVDA) is the more undervalued stock at a PEG of 0. 27x versus Intuitive Surgical, Inc. 's 1. 99x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, NVIDIA Corporation (NVDA) trades at 26. 0x forward P/E versus 43. 3x for Intuitive Surgical, Inc. — 17. 3x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for RR: 127. 3% to $6. 00.

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, Intuitive Surgical, Inc.

(ISRG) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 1. 00), +549. 2% 10Y return). iRobot Corporation (IRBT) carries a higher beta of 5. 31 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ISRG: +549. 2%, IRBT: -99. 9%), 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.

These companies operate in different sectors (RR (Industrials) and IRBT (Consumer Cyclical) and ISRG (Healthcare) and NVDA (Technology)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: RR is a small-cap high-growth stock; IRBT is a small-cap quality compounder stock; ISRG is a mid-cap high-growth stock; NVDA is a mega-cap high-growth 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.