KRRO vs PRME vs BEAM vs CRSP

For growth investors, Korro Bio, Inc.

(KRRO) is the stronger pick with 181. 5% revenue growth year-over-year, versus -90. 0% for CRISPR Therapeutics AG (CRSP). Analysts rate Korro Bio, Inc. (KRRO) a "Buy" — based on 12 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, CRISPR Therapeutics AG (CRSP) delivered a total return of -51.

3%, compared to -97. 5% for Korro Bio, Inc. (KRRO). Over 10 years, the gap is even starker: CRSP returned +272. 0% versus KRRO's -98. 1%. 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), CRISPR Therapeutics AG (CRSP) is the lower-risk stock at 1.

93β versus Korro Bio, Inc. 's 3. 43β — meaning KRRO is approximately 78% more volatile than CRSP relative to the S&P 500. On balance sheet safety, CRISPR Therapeutics AG (CRSP) carries a lower debt/equity ratio of 21% versus 96% for Prime Medicine, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Korro Bio, Inc.

(KRRO) is pulling ahead at 181. 5% versus -90. 0% for CRISPR Therapeutics AG (CRSP). On earnings-per-share growth, the picture is similar: Beam Therapeutics Inc. grew EPS 82. 3% year-over-year, compared to -49. 1% for CRISPR Therapeutics AG. Over a 3-year CAGR, CRSP leads at 100. 4% 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.

Beam Therapeutics Inc.

(BEAM) is the more profitable company, earning -57. 2% net margin versus -165. 7% for CRISPR Therapeutics AG — meaning it keeps -57. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: BEAM leads at -274. 6% versus -161. 9% for CRSP. At the gross margin level — before operating expenses — BEAM leads at 84. 0%, 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, CRISPR Therapeutics AG (CRSP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+272.

0% 10Y return). Korro Bio, Inc. (KRRO) carries a higher beta of 3. 43 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CRSP: +272. 0%, KRRO: -98. 1%), 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: KRRO is a small-cap high-growth stock; PRME is a small-cap high-growth stock; BEAM is a small-cap high-growth stock; CRSP is a small-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.