ESP vs AEIS

For growth investors, Advanced Energy Industries, Inc.

(AEIS) is the stronger pick with 21. 4% revenue growth year-over-year, versus 13. 5% for Espey Mfg. & Electronics Corp. (ESP). Espey Mfg. & Electronics Corp. (ESP) offers the better valuation at 20. 2x trailing P/E (16. 2x forward), making it the more compelling value choice. Analysts rate Advanced Energy Industries, Inc. (AEIS) a "Buy" — based on 24 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, Espey Mfg.

& Electronics Corp. (ESP) is the cheapest at 20. 2x versus Advanced Energy Industries, Inc. at 97. 0x. On forward P/E, Espey Mfg. & Electronics Corp. is actually cheaper at 16. 2x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Espey Mfg. & Electronics Corp. wins at 0. 37x versus Advanced Energy Industries, Inc. 's 21. 35x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Espey Mfg.

& Electronics Corp. (ESP) delivered a total return of +333. 5%, compared to +260. 2% for Advanced Energy Industries, Inc. (AEIS). Over 10 years, the gap is even starker: AEIS returned +880. 6% versus ESP's +167. 4%. 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), Espey Mfg.

& Electronics Corp. (ESP) is the lower-risk stock at 0. 74β versus Advanced Energy Industries, Inc. 's 2. 38β — meaning AEIS is approximately 224% more volatile than ESP relative to the S&P 500.

By revenue growth (latest reported year), Advanced Energy Industries, Inc.

(AEIS) is pulling ahead at 21. 4% versus 13. 5% for Espey Mfg. & Electronics Corp. (ESP). On earnings-per-share growth, the picture is similar: Advanced Energy Industries, Inc. grew EPS 168. 5% year-over-year, compared to 31. 9% for Espey Mfg. & Electronics Corp.. Over a 3-year CAGR, ESP leads at 11. 0% 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.

Espey Mfg.

& Electronics Corp. (ESP) is the more profitable company, earning 18. 5% net margin versus 8. 2% for Advanced Energy Industries, Inc. — meaning it keeps 18. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: ESP leads at 18. 5% versus 10. 9% for AEIS. At the gross margin level — before operating expenses — AEIS leads at 37. 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, Espey Mfg. & Electronics Corp. (ESP) is the more undervalued stock at a PEG of 0. 37x versus Advanced Energy Industries, Inc. 's 21. 35x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Espey Mfg. & Electronics Corp. (ESP) trades at 16. 2x forward P/E versus 40. 0x for Advanced Energy Industries, Inc. — 23. 8x cheaper on a one-year earnings basis.

All stocks in this comparison pay dividends.

Espey Mfg. & Electronics Corp. (ESP) offers the highest yield at 1. 6%, versus 0. 1% for Advanced Energy Industries, Inc. (AEIS).

For long-horizon retirement investors, Espey Mfg.

& Electronics Corp. (ESP) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 74), 1. 6% yield, +167. 4% 10Y return). Advanced Energy Industries, Inc. (AEIS) carries a higher beta of 2. 38 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (ESP: +167. 4%, AEIS: +880. 6%), 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.

In terms of investment character: ESP is a small-cap quality compounder stock; AEIS is a mid-cap high-growth stock. ESP pays a dividend while AEIS does 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.