ENGS vs GREE vs MARA vs NRGV vs RIOT

For growth investors, Energy Vault Holdings, Inc.

(NRGV) is the stronger pick with 340. 9% revenue growth year-over-year, versus -15. 4% for Greenidge Generation Holdings Inc. (GREE). Analysts rate Marathon Digital Holdings, Inc. (MARA) 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.

Over the past 5 years, Riot Platforms, Inc.

(RIOT) delivered a total return of -19. 6%, compared to -99. 1% for Greenidge Generation Holdings Inc. (GREE). Over 10 years, the gap is even starker: RIOT returned +786. 6% versus ENGS's -74. 7%. 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), Energys Group Limited Ordinary Shares (ENGS) is the lower-risk stock at 0.

51β versus Riot Platforms, Inc. 's 3. 92β — meaning RIOT is approximately 667% more volatile than ENGS relative to the S&P 500. On balance sheet safety, Riot Platforms, Inc. (RIOT) carries a lower debt/equity ratio of 10% versus 107% for Energy Vault Holdings, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Energy Vault Holdings, Inc.

(NRGV) is pulling ahead at 340. 9% versus -15. 4% for Greenidge Generation Holdings Inc. (GREE). On earnings-per-share growth, the picture is similar: Greenidge Generation Holdings Inc. grew EPS 57. 6% year-over-year, compared to -673. 5% for Riot Platforms, Inc.. Over a 3-year CAGR, NRGV leads at 11. 8% 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.

Energys Group Limited Ordinary Shares (ENGS) is the more profitable company, earning -11.

6% net margin versus -144. 6% for Marathon Digital Holdings, Inc. — meaning it keeps -11. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ENGS leads at -2. 4% versus -90. 6% for MARA. At the gross margin level — before operating expenses — GREE leads at 79. 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.

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, Energys Group Limited Ordinary Shares (ENGS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0.

51)). Greenidge Generation Holdings Inc. (GREE) carries a higher beta of 3. 37 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ENGS: -74. 7%, GREE: -62. 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 (ENGS (Industrials) and GREE (Financial Services) and MARA (Financial Services) and NRGV (Utilities) and RIOT (Financial Services)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: ENGS is a small-cap high-growth stock; GREE is a small-cap quality compounder stock; MARA is a small-cap high-growth stock; NRGV is a small-cap high-growth stock; RIOT is a small-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.