CREG vs PESI vs CWST vs CECO vs AMRC

For growth investors, CECO Environmental Corp.

(CECO) is the stronger pick with 38. 8% revenue growth year-over-year, versus 4. 3% for Perma-Fix Environmental Services, Inc. (PESI). Ameresco, Inc. (AMRC) offers the better valuation at 35. 8x trailing P/E (25. 0x forward), making it the more compelling value choice. Analysts rate Casella Waste Systems, Inc. (CWST) a "Buy" — based on 19 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, Ameresco, Inc.

(AMRC) is the cheapest at 35. 8x versus Casella Waste Systems, Inc. at 712. 1x. On forward P/E, Ameresco, Inc. is actually cheaper at 25. 0x.

Over the past 5 years, CECO Environmental Corp.

(CECO) delivered a total return of +1003%, compared to -99. 5% for Smart Powerr Corp. (CREG). Over 10 years, the gap is even starker: CECO returned +1282% versus CREG's -99. 8%. 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), Casella Waste Systems, Inc.

(CWST) is the lower-risk stock at 0. 32β versus Ameresco, Inc. 's 2. 03β — meaning AMRC is approximately 529% more volatile than CWST relative to the S&P 500. On balance sheet safety, Smart Powerr Corp. (CREG) carries a lower debt/equity ratio of 5% versus 173% for Ameresco, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), CECO Environmental Corp.

(CECO) is pulling ahead at 38. 8% versus 4. 3% for Perma-Fix Environmental Services, Inc. (PESI). On earnings-per-share growth, the picture is similar: CECO Environmental Corp. grew EPS 280. 6% year-over-year, compared to -89. 6% for Smart Powerr Corp.. Over a 3-year CAGR, CECO leads at 22. 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.

CECO Environmental Corp.

(CECO) is the more profitable company, earning 6. 5% net margin versus -36. 2% for Smart Powerr Corp. — meaning it keeps 6. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: CECO leads at 6. 7% versus -32. 9% for CREG. At the gross margin level — before operating expenses — CECO leads at 32. 7%, 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, Ameresco, Inc.

(AMRC) trades at 25. 0x forward P/E versus 63. 9x for Casella Waste Systems, Inc. — 38. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for PESI: 61. 1% to $18. 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, Casella Waste Systems, Inc.

(CWST) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 32), +1059% 10Y return). Smart Powerr Corp. (CREG) carries a higher beta of 1. 83 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CWST: +1059%, CREG: -99. 8%), 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 (CREG (Utilities) and PESI (Industrials) and CWST (Industrials) and CECO (Industrials) and AMRC (Industrials)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: CREG is a small-cap quality compounder stock; PESI is a small-cap quality compounder stock; CWST is a small-cap high-growth stock; CECO is a small-cap high-growth stock; AMRC 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.