CSPI vs NTCT vs VIAV vs CSCO vs KEYS

For growth investors, Viavi Solutions Inc.

(VIAV) is the stronger pick with 8. 4% revenue growth year-over-year, versus -0. 8% for NetScout Systems, Inc. (NTCT). 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 Viavi Solutions Inc. (VIAV) a "Buy" — based on 19 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 Viavi Solutions Inc. at 341. 4x. On forward P/E, NetScout Systems, Inc. is actually cheaper at 16. 2x — notably different from the trailing picture, reflecting expected earnings growth. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Keysight Technologies, Inc. wins at 5. 05x versus Viavi Solutions Inc. 's 11. 99x.

Over the past 5 years, Viavi Solutions Inc.

(VIAV) delivered a total return of +216. 5%, compared to +46. 6% for NetScout Systems, Inc. (NTCT). Over 10 years, the gap is even starker: KEYS returned +1301% versus NTCT's +70. 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), Cisco Systems, Inc.

(CSCO) is the lower-risk stock at 0. 90β versus Keysight Technologies, Inc. 's 1. 73β — meaning KEYS is approximately 91% more volatile than CSCO relative to the S&P 500. On balance sheet safety, NetScout Systems, Inc. (NTCT) carries a lower debt/equity ratio of 5% versus 89% for Viavi Solutions Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Viavi Solutions Inc.

(VIAV) is pulling ahead at 8. 4% 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, CSCO leads at 3. 2% 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.

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, Keysight Technologies, Inc. (KEYS) is the more undervalued stock at a PEG of 5. 05x versus Viavi Solutions Inc. 's 11. 99x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, NetScout Systems, Inc. (NTCT) trades at 16. 2x forward P/E versus 54. 7x for Viavi Solutions Inc. — 38. 5x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for CSCO: 2. 5% to $99. 00.

In this comparison, CSCO (1.

7% yield), CSPI (1. 4% yield) pay a dividend. NTCT, VIAV, KEYS 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). Viavi Solutions Inc. (VIAV) carries a higher beta of 1. 65 — 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%, VIAV: +718. 1%), 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.

CSPI, CSCO pay a dividend while NTCT, VIAV, KEYS 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.