FTDR vs SERV vs BLD vs CART

For growth investors, Serve Robotics Inc.

(SERV) is the stronger pick with 46. 3% revenue growth year-over-year, versus 1. 5% for TopBuild Corp. (BLD). Frontdoor, Inc. (FTDR) offers the better valuation at 19. 9x trailing P/E (15. 2x forward), making it the more compelling value choice. Analysts rate Serve Robotics Inc. (SERV) a "Buy" — based on 20 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, Frontdoor, Inc.

(FTDR) is the cheapest at 19. 9x versus Instacart (Maplebear Inc. ) at 23. 7x. On forward P/E, Frontdoor, Inc. is actually cheaper at 15. 2x. The PEG ratio (P/E divided by earnings growth rate) is the most growth-adjusted single valuation metric: Frontdoor, Inc. wins at 0. 72x versus TopBuild Corp. 's 1. 19x — a PEG below 1. 0 traditionally signals the market is underpricing earnings growth.

Over the past 5 years, TopBuild Corp.

(BLD) delivered a total return of +91. 2%, compared to +12. 7% for Instacart (Maplebear Inc. ) (CART). Over 10 years, the gap is even starker: BLD returned +1219% versus CART's +12. 7%. 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), Instacart (Maplebear Inc.

) (CART) is the lower-risk stock at 0. 39β versus Serve Robotics Inc. 's 4. 09β — meaning SERV is approximately 959% more volatile than CART relative to the S&P 500. On balance sheet safety, Instacart (Maplebear Inc. ) (CART) carries a lower debt/equity ratio of 1% versus 5% for Frontdoor, Inc. — giving it more financial flexibility in a downturn.

By revenue growth (latest reported year), Serve Robotics Inc.

(SERV) is pulling ahead at 46. 3% versus 1. 5% for TopBuild Corp. (BLD). On earnings-per-share growth, the picture is similar: Frontdoor, Inc. grew EPS 13. 6% year-over-year, compared to -52. 3% for Serve Robotics Inc.. Over a 3-year CAGR, SERV leads at 190. 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.

Frontdoor, Inc.

(FTDR) is the more profitable company, earning 12. 2% net margin versus -38. 2% for Serve Robotics Inc. — meaning it keeps 12. 2% of every revenue dollar as bottom-line profit. Operating margin tells a similar story: FTDR leads at 19. 1% versus -42. 5% for SERV. At the gross margin level — before operating expenses — CART leads at 73. 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, Frontdoor, Inc. (FTDR) is the more undervalued stock at a PEG of 0. 72x versus TopBuild Corp. 's 1. 19x. A PEG below 1. 0 is traditionally considered the threshold for growth-adjusted undervaluation. On forward earnings alone, Frontdoor, Inc. (FTDR) trades at 15. 2x forward P/E versus 23. 5x for TopBuild Corp. — 8. 4x cheaper on a one-year earnings basis. Analyst consensus price targets imply the most upside for SERV: 79. 6% to $16. 33.

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, Instacart (Maplebear Inc.

) (CART) is the stronger choice — it scores higher on the combination of lower volatility, dividend reliability, and long-term compounding (low volatility (β 0. 39)). Serve Robotics Inc. (SERV) carries a higher beta of 4. 09 — meaning larger drawdowns in market downturns, which matters significantly when you cannot wait years for a recovery. Both have compounded well over 10 years (CART: +12. 7%, SERV: +70. 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.

These companies operate in different sectors (FTDR (Consumer Cyclical) and SERV (Industrials) and BLD (Industrials) and CART (Consumer Cyclical)), which means they face different economic cycles, regulatory environments, and macro sensitivities — making direct comparison nuanced.

In terms of investment character: FTDR is a small-cap quality compounder stock; SERV is a small-cap high-growth stock; BLD is a mid-cap quality compounder stock; CART 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.