TCRX vs TMO vs ILMN vs DHR

For growth investors, TScan Therapeutics, Inc.

(TCRX) is the stronger pick with 266. 7% revenue growth year-over-year, versus -0. 8% for Illumina, Inc. (ILMN). Illumina, Inc. (ILMN) offers the better valuation at 25. 5x trailing P/E (26. 8x forward), making it the more compelling value choice. Analysts rate TScan Therapeutics, Inc. (TCRX) a "Buy" — based on 8 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, Illumina, Inc.

(ILMN) is the cheapest at 25. 5x versus Danaher Corporation at 34. 9x. 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: Illumina, Inc. wins at 6. 33x versus Danaher Corporation's 34. 35x.

Over the past 5 years, Thermo Fisher Scientific Inc.

(TMO) delivered a total return of +2. 8%, compared to -88. 5% for TScan Therapeutics, Inc. (TCRX). Over 10 years, the gap is even starker: TMO returned +229. 1% versus TCRX's -88. 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), Danaher Corporation (DHR) is the lower-risk stock at 0.

94β versus TScan Therapeutics, Inc. 's 2. 35β — meaning TCRX is approximately 150% more volatile than DHR relative to the S&P 500. On balance sheet safety, Danaher Corporation (DHR) carries a lower debt/equity ratio of 35% versus 94% for Illumina, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), TScan Therapeutics, Inc.

(TCRX) is pulling ahead at 266. 7% versus -0. 8% for Illumina, Inc. (ILMN). On earnings-per-share growth, the picture is similar: Illumina, Inc. grew EPS 170. 9% year-over-year, compared to -4. 7% for Danaher Corporation. Over a 3-year CAGR, TMO leads at -0. 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.

Illumina, Inc.

(ILMN) is the more profitable company, earning 19. 6% net margin versus -1256. 8% for TScan Therapeutics, Inc. — meaning it keeps 19. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: DHR leads at 20. 9% versus -1315. 4% for TCRX. At the gross margin level — before operating expenses — TCRX leads at 72. 2%, 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, Illumina, Inc. (ILMN) is the more undervalued stock at a PEG of 6. 33x versus Danaher Corporation's 34. 35x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, Thermo Fisher Scientific Inc. (TMO) trades at 19. 1x forward P/E versus 26. 8x for Illumina, Inc. — 7. 7x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for TCRX: 519. 8% to $7. 50.

In this comparison, DHR (0.

7% yield), TMO (0. 4% yield) pay a dividend. TCRX, ILMN do not pay a meaningful dividend and should not be held primarily for income.

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

94), 0. 7% yield, +219. 3% 10Y return). TScan Therapeutics, Inc. (TCRX) carries a higher beta of 2. 35 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (DHR: +219. 3%, TCRX: -88. 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: TCRX is a small-cap high-growth stock; TMO is a mid-cap quality compounder stock; ILMN is a mid-cap quality compounder stock; DHR is a mid-cap quality compounder stock. DHR pays a dividend while TCRX, TMO, ILMN 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.