VIAV vs KEYS vs LITE vs CIEN vs NTCT

For growth investors, Lumentum Holdings Inc.

(LITE) is the stronger pick with 21. 0% revenue growth year-over-year, versus -0. 8% for NetScout Systems, Inc. (NTCT). Keysight Technologies, Inc. (KEYS) offers the better valuation at 72. 7x trailing P/E (39. 8x 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, Keysight Technologies, Inc.

(KEYS) is the cheapest at 72. 7x versus Lumentum Holdings Inc. at 2412. 9x. On forward P/E, NetScout Systems, Inc. is actually cheaper at 15. 9x — 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 4. 97x versus Viavi Solutions Inc. 's 12. 09x.

Over the past 5 years, Lumentum Holdings Inc.

(LITE) delivered a total return of +976. 6%, compared to +42. 9% for NetScout Systems, Inc. (NTCT). Over 10 years, the gap is even starker: LITE returned +36. 4% versus NTCT's +66. 6%. 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), NetScout Systems, Inc.

(NTCT) is the lower-risk stock at 1. 12β versus Lumentum Holdings Inc. 's 2. 69β — meaning LITE is approximately 139% more volatile than NTCT relative to the S&P 500. On balance sheet safety, NetScout Systems, Inc. (NTCT) carries a lower debt/equity ratio of 5% versus 2% for Lumentum Holdings Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Lumentum Holdings Inc.

(LITE) is pulling ahead at 21. 0% 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, 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.

Keysight Technologies, Inc.

(KEYS) is the more profitable company, earning 15. 7% net margin versus -44. 6% for NetScout Systems, Inc. — meaning it keeps 15. 7% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: KEYS leads at 17. 6% 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 4. 97x versus Viavi Solutions Inc. 's 12. 09x. Both stocks trade at elevated growth-adjusted valuations, so expected growth needs to materialise. On forward earnings alone, NetScout Systems, Inc. (NTCT) trades at 15. 9x forward P/E versus 114. 4x for Lumentum Holdings Inc. — 98. 6x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for KEYS: -18. 5% to $289. 25.

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, Keysight Technologies, Inc.

(KEYS) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (+1279% 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 (KEYS: +1279%, 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.

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: VIAV is a mid-cap quality compounder stock; KEYS is a mid-cap quality compounder stock; LITE is a mid-cap high-growth stock; CIEN is a mid-cap high-growth stock; NTCT is a small-cap quality compounder 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.