POLA vs GNRC vs ACHR vs PESI vs GTLS

For growth investors, Perma-Fix Environmental Services, Inc.

(PESI) is the stronger pick with 4. 3% revenue growth year-over-year, versus -8. 7% for Polar Power, Inc. (POLA). Generac Holdings Inc. (GNRC) offers the better valuation at 99. 2x trailing P/E (30. 2x forward), making it the more compelling value choice. Analysts rate Generac Holdings Inc. (GNRC) a "Buy" — based on 39 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, Generac Holdings Inc.

(GNRC) is the cheapest at 99. 2x versus Chart Industries, Inc. at 628. 5x. On forward P/E, Chart Industries, Inc. is actually cheaper at 16. 4x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Perma-Fix Environmental Services, Inc.

(PESI) delivered a total return of +45. 6%, compared to -97. 3% for Polar Power, Inc. (POLA). Over 10 years, the gap is even starker: GTLS returned +772. 7% versus POLA's -97. 0%. 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), Chart Industries, Inc.

(GTLS) is the lower-risk stock at 0. 49β versus Archer Aviation Inc. 's 2. 95β — meaning ACHR is approximately 498% more volatile than GTLS relative to the S&P 500. On balance sheet safety, Archer Aviation Inc. (ACHR) carries a lower debt/equity ratio of 2% versus 111% for Chart Industries, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Perma-Fix Environmental Services, Inc.

(PESI) is pulling ahead at 4. 3% versus -8. 7% for Polar Power, Inc. (POLA). On earnings-per-share growth, the picture is similar: Perma-Fix Environmental Services, Inc. grew EPS 43. 6% year-over-year, compared to -272. 0% for Polar Power, Inc.. Over a 3-year CAGR, GTLS leads at 38. 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.

Generac Holdings Inc.

(GNRC) is the more profitable company, earning 3. 8% net margin versus -2060. 7% for Archer Aviation Inc. — meaning it keeps 3. 8% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: GTLS leads at 15. 2% versus -2431. 0% for ACHR. At the gross margin level — before operating expenses — GNRC leads at 38. 3%, 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.

On forward earnings alone, Chart Industries, Inc.

(GTLS) trades at 16. 4x forward P/E versus 30. 2x for Generac Holdings Inc. — 13. 8x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for ACHR: 96. 3% to $12. 33.

In this comparison, GTLS (0.

3% yield) pays a dividend. POLA, GNRC, ACHR, PESI do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Chart Industries, Inc.

(GTLS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 49), +772. 7% 10Y return). Archer Aviation Inc. (ACHR) carries a higher beta of 2. 95 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (GTLS: +772. 7%, ACHR: -35. 0%), 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 Industrials sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

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.