CSPI vs DGII vs CALX vs CSCO vs CIEN

For growth investors, Calix, Inc.

(CALX) is the stronger pick with 20. 3% revenue growth year-over-year, versus 1. 5% for Digi International Inc. (DGII). Cisco Systems, Inc. (CSCO) offers the better valuation at 37. 9x trailing P/E (23. 2x 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, Cisco Systems, Inc.

(CSCO) is the cheapest at 37. 9x versus Ciena Corporation at 644. 8x. On forward P/E, Cisco Systems, Inc. is actually cheaper at 23. 2x.

Over the past 5 years, Ciena Corporation (CIEN) delivered a total return of +924.

1%, compared to -0. 1% for Calix, Inc. (CALX). Over 10 years, the gap is even starker: CIEN returned +32. 9% versus CSPI's +246. 2%. 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), Cisco Systems, Inc.

(CSCO) is the lower-risk stock at 0. 90β versus Ciena Corporation's 2. 51β — meaning CIEN is approximately 178% more volatile than CSCO relative to the S&P 500. On balance sheet safety, Calix, Inc. (CALX) carries a lower debt/equity ratio of 3% versus 63% for Cisco Systems, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Calix, Inc.

(CALX) is pulling ahead at 20. 3% versus 1. 5% for Digi International Inc. (DGII). On earnings-per-share growth, the picture is similar: Calix, Inc. grew EPS 157. 8% year-over-year, compared to 0. 4% for Cisco Systems, Inc.. Over a 3-year CAGR, CIEN leads at 9. 5% 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.

Cisco Systems, Inc.

(CSCO) is the more profitable company, earning 18. 0% net margin versus -0. 2% for CSP Inc. — meaning it keeps 18. 0% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: CSCO leads at 20. 8% versus -5. 3% for CSPI. At the gross margin level — before operating expenses — CSCO leads at 64. 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, Cisco Systems, Inc.

(CSCO) trades at 23. 2x forward P/E versus 89. 1x for Ciena Corporation — 65. 9x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CALX: 41. 1% to $61. 00.

In this comparison, CSCO (1.

7% yield), CSPI (1. 4% yield) pay a dividend. DGII, CALX, CIEN do not pay a meaningful dividend and should not be held primarily for income.

For long-horizon retirement investors, Cisco Systems, Inc.

(CSCO) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 90), 1. 7% yield, +318. 3% 10Y return). Ciena Corporation (CIEN) carries a higher beta of 2. 51 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CSCO: +318. 3%, CIEN: +32. 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.

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: CSPI is a small-cap quality compounder stock; DGII is a small-cap quality compounder stock; CALX is a small-cap high-growth stock; CSCO is a large-cap quality compounder stock; CIEN is a mid-cap high-growth stock. CSPI, CSCO pay a dividend while DGII, CALX, CIEN 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.