TGS vs KMI vs WMB vs ET vs MPLX

For growth investors, Transportadora de Gas del Sur S.

A. (TGS) is the stronger pick with 64. 8% revenue growth year-over-year, versus -0. 1% for Energy Transfer LP (ET). MPLX Lp (MPLX) offers the better valuation at 11. 7x trailing P/E (12. 7x forward), making it the more compelling value choice. Analysts rate Transportadora de Gas del Sur S. A. (TGS) 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, MPLX Lp (MPLX) is the cheapest at 11.

7x versus The Williams Companies, Inc. at 34. 1x. On forward P/E, Transportadora de Gas del Sur S. A. is actually cheaper at 0. 0x — 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: Kinder Morgan, Inc. wins at 0. 23x versus The Williams Companies, Inc. 's 0. 47x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, Transportadora de Gas del Sur S.

A. (TGS) delivered a total return of +598. 5%, compared to +108. 4% for Kinder Morgan, Inc. (KMI). Over 10 years, the gap is even starker: TGS returned +449. 2% versus KMI's +142. 1%. 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), Kinder Morgan, Inc.

(KMI) is the lower-risk stock at 0. 10β versus Transportadora de Gas del Sur S. A. 's 0. 90β — meaning TGS is approximately 849% more volatile than KMI relative to the S&P 500. On balance sheet safety, Transportadora de Gas del Sur S. A. (TGS) carries a lower debt/equity ratio of 53% versus 196% for The Williams Companies, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Transportadora de Gas del Sur S.

A. (TGS) is pulling ahead at 64. 8% versus -0. 1% for Energy Transfer LP (ET). On earnings-per-share growth, the picture is similar: Transportadora de Gas del Sur S. A. grew EPS 32. 2% year-over-year, compared to 5. 5% for Energy Transfer LP. Over a 3-year CAGR, TGS leads at 22. 6% 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.

MPLX Lp (MPLX) is the more profitable company, earning 41.

6% net margin versus 5. 9% for Energy Transfer LP — meaning it keeps 41. 6% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: TGS leads at 43. 3% versus 11. 4% for ET. At the gross margin level — before operating expenses — TGS leads at 53. 6%, 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, Kinder Morgan, Inc. (KMI) is the more undervalued stock at a PEG of 0. 23x versus The Williams Companies, Inc. 's 0. 47x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Transportadora de Gas del Sur S. A. (TGS) trades at 0. 0x forward P/E versus 31. 2x for The Williams Companies, Inc. — 31. 2x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for KMI: 11. 1% to $35. 00.

All stocks in this comparison pay dividends.

MPLX Lp (MPLX) offers the highest yield at 7. 0%, versus 2. 7% for The Williams Companies, Inc. (WMB).

For long-horizon retirement investors, The Williams Companies, Inc.

(WMB) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 17), 2. 7% yield, +371. 1% 10Y return). Both have compounded well over 10 years (WMB: +371. 1%, TGS: +449. 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 Energy sector, making this a peer-level intra-sector comparison — the same macro tailwinds and headwinds will affect both.

In terms of investment character: TGS is a small-cap high-growth stock; KMI is a mid-cap income-oriented stock; WMB is a mid-cap quality compounder stock; ET is a mid-cap deep-value stock; MPLX is a mid-cap deep-value 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.