DGII vs LTRX vs CALX vs SLAB

For growth investors, Silicon Laboratories Inc.

(SLAB) is the stronger pick with 34. 3% revenue growth year-over-year, versus -23. 3% for Lantronix, Inc. (LTRX). Digi International Inc. (DGII) offers the better valuation at 57. 4x trailing P/E (26. 9x forward), making it the more compelling value choice. Analysts rate Digi International Inc. (DGII) a "Buy" — based on 18 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, Digi International Inc.

(DGII) is the cheapest at 57. 4x versus Calix, Inc. at 167. 4x. On forward P/E, Calix, Inc. is actually cheaper at 24. 5x — notably different from the trailing picture, reflecting expected earnings growth.

Over the past 5 years, Digi International Inc.

(DGII) delivered a total return of +247. 1%, compared to -9. 3% for Calix, Inc. (CALX). Over 10 years, the gap is even starker: CALX returned +513. 0% versus SLAB's +375. 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), Calix, Inc.

(CALX) is the lower-risk stock at 0. 99β versus Lantronix, Inc. 's 2. 17β — meaning LTRX is approximately 118% more volatile than CALX relative to the S&P 500. On balance sheet safety, Calix, Inc. (CALX) carries a lower debt/equity ratio of 3% versus 28% for Lantronix, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Silicon Laboratories Inc.

(SLAB) is pulling ahead at 34. 3% versus -23. 3% for Lantronix, Inc. (LTRX). On earnings-per-share growth, the picture is similar: Calix, Inc. grew EPS 157. 8% year-over-year, compared to -141. 7% for Lantronix, Inc.. Over a 3-year CAGR, CALX leads at 4. 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.

Digi International Inc.

(DGII) is the more profitable company, earning 9. 5% net margin versus -9. 3% for Lantronix, Inc. — meaning it keeps 9. 5% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: DGII leads at 13. 1% versus -9. 0% for SLAB. At the gross margin level — before operating expenses — DGII leads at 62. 9%, 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, Calix, Inc.

(CALX) trades at 24. 5x forward P/E versus 80. 4x for Silicon Laboratories Inc. — 55. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for LTRX: 51. 5% to $8. 83.

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, Calix, Inc.

(CALX) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 99), +513. 0% 10Y return). Lantronix, Inc. (LTRX) carries a higher beta of 2. 17 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CALX: +513. 0%, LTRX: +425. 2%), 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 Technology sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: DGII is a small-cap quality compounder stock; LTRX is a small-cap quality compounder stock; CALX is a small-cap high-growth stock; SLAB 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.