PDEX vs LIQT vs POWI vs NSYS

For growth investors, Pro-Dex, Inc.

(PDEX) is the stronger pick with 23. 7% revenue growth year-over-year, versus -8. 0% for Nortech Systems Incorporated (NSYS). Pro-Dex, Inc. (PDEX) offers the better valuation at 22. 2x trailing P/E (24. 9x forward), making it the more compelling value choice. Analysts rate Pro-Dex, Inc. (PDEX) a "Buy" — based on 1 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, Pro-Dex, Inc.

(PDEX) is the cheapest at 22. 2x versus Power Integrations, Inc. at 187. 9x. On forward P/E, Pro-Dex, Inc. is actually cheaper at 24. 9x.

Over the past 5 years, Nortech Systems Incorporated (NSYS) delivered a total return of +118.

3%, compared to -96. 1% for LiqTech International, Inc. (LIQT). Over 10 years, the gap is even starker: PDEX returned +1472% versus LIQT's -91. 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), Nortech Systems Incorporated (NSYS) is the lower-risk stock at 0.

47β versus Power Integrations, Inc. 's 2. 11β — meaning POWI is approximately 349% more volatile than NSYS relative to the S&P 500. On balance sheet safety, Pro-Dex, Inc. (PDEX) carries a lower debt/equity ratio of 45% versus 117% for LiqTech International, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Pro-Dex, Inc.

(PDEX) is pulling ahead at 23. 7% versus -8. 0% for Nortech Systems Incorporated (NSYS). On earnings-per-share growth, the picture is similar: Pro-Dex, Inc. grew EPS 345. 0% year-over-year, compared to -119. 7% for Nortech Systems Incorporated. Over a 3-year CAGR, PDEX leads at 16. 6% 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.

Pro-Dex, Inc.

(PDEX) is the more profitable company, earning 13. 5% net margin versus -51. 7% for LiqTech International, Inc. — meaning it keeps 13. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: PDEX leads at 16. 1% versus -50. 3% for LIQT. At the gross margin level — before operating expenses — POWI leads at 54. 5%, 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, Pro-Dex, Inc.

(PDEX) trades at 24. 9x forward P/E versus 58. 7x for Power Integrations, Inc. — 33. 8x cheaper on a one-year earnings basis.

In this comparison, POWI (1.

1% yield) pays a dividend. PDEX, LIQT, NSYS do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Pro-Dex, Inc.

(PDEX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 68), +1472% 10Y return). Power Integrations, Inc. (POWI) carries a higher beta of 2. 11 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (PDEX: +1472%, POWI: +239. 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.

These companies operate in different sectors (PDEX (Healthcare) and LIQT (Industrials) and POWI (Technology) and NSYS (Technology)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: PDEX is a small-cap high-growth stock; LIQT is a small-cap quality compounder stock; POWI is a small-cap quality compounder stock; NSYS is a small-cap quality compounder stock. POWI pays a dividend while PDEX, LIQT, NSYS do 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.