RDCM vs VIAV vs NTCT vs CSCO vs CIEN

For growth investors, Ciena Corporation (CIEN) is the stronger pick with 18.

8% revenue growth year-over-year, versus -0. 8% for NetScout Systems, Inc. (NTCT). RADCOM Ltd. (RDCM) offers the better valuation at 22. 3x trailing P/E (13. 5x forward), making it the more compelling value choice. Analysts rate RADCOM Ltd. (RDCM) a "Buy" — based on 3 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, RADCOM Ltd.

(RDCM) is the cheapest at 22. 3x versus Ciena Corporation at 633. 2x. On forward P/E, RADCOM Ltd. is actually cheaper at 13. 5x.

Over the past 5 years, Ciena Corporation (CIEN) delivered a total return of +899.

2%, compared to +42. 9% for NetScout Systems, Inc. (NTCT). Over 10 years, the gap is even starker: CIEN returned +32. 3% versus RDCM's +21. 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), RADCOM Ltd.

(RDCM) is the lower-risk stock at 0. 78β versus Ciena Corporation's 2. 46β — meaning CIEN is approximately 216% more volatile than RDCM relative to the S&P 500. On balance sheet safety, RADCOM Ltd. (RDCM) carries a lower debt/equity ratio of 3% versus 89% for Viavi Solutions Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Ciena Corporation (CIEN) is pulling ahead at 18.

8% versus -0. 8% for NetScout Systems, Inc. (NTCT). On earnings-per-share growth, the picture is similar: Viavi Solutions Inc. grew EPS 225. 0% year-over-year, compared to -144. 4% for NetScout Systems, Inc.. Over a 3-year CAGR, RDCM leads at 15. 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.

Cisco Systems, Inc.

(CSCO) is the more profitable company, earning 18. 0% net margin versus -44. 6% for NetScout Systems, 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 -44. 7% for NTCT. At the gross margin level — before operating expenses — NTCT leads at 78. 3%, 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, RADCOM Ltd.

(RDCM) trades at 13. 5x forward P/E versus 87. 5x for Ciena Corporation — 74. 1x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CSCO: 4. 7% to $96. 50.

In this comparison, CSCO (1.

7% yield) pays a dividend. RDCM, VIAV, NTCT, 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. 92), 1. 7% yield, +301. 7% 10Y return). Ciena Corporation (CIEN) carries a higher beta of 2. 46 — 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: +301. 7%, CIEN: +32. 3%), 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 (RDCM (Communication Services) and VIAV (Technology) and NTCT (Technology) and CSCO (Technology) and CIEN (Technology)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: RDCM is a small-cap high-growth stock; VIAV is a mid-cap quality compounder stock; NTCT is a small-cap quality compounder stock; CSCO is a large-cap quality compounder stock; CIEN is a mid-cap high-growth stock. CSCO pays a dividend while RDCM, VIAV, NTCT, 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.