Roughly even at honest race speeds. Cannondale claims the Gen 4 SuperSix saves 12 watts at 45 km/h over the previous SuperSix. Colnago claims the V4Rs saves 27.7 watts at 50 km/h over the V3Rs (a 6% improvement), with 16% of that coming from the CC.01 integrated cockpit alone.

Real-world differences in steady-state aero between the two are within rider-position noise. If you're chasing the absolute fastest tube shapes, neither of these is a dedicated aero bike — Cannondale's own SystemSix and Colnago's Y1Rs sit in that lane.

The SuperSix EVO, narrowly. A top-spec LAB71 with Dura-Ace hits the UCI 6.8 kg limit per Cannondale; the V4Rs in equivalent trim is reviewed at 7.15–7.24 kg per Cyclist and Just Ride Bikes — call it ~300–400 g of frame-and-build difference. That's roughly 0.5% of a 70 kg system, worth a few seconds on a 20-minute climb.

The SuperSix also sits taller at the bars in equivalent sizes (16 mm more stack at 54 vs 485), which most riders find more sustainable on long, seated grinders.

SuperSix EVO: Cannondale's official clearance is 32 mm, but reviewers consistently report fitting 34 mm tires on the wider HollowGram R-SL 50 wheels.

Colnago V4Rs: 30 mm officially. Some reviewers cite 32 mm; we go with the manufacturer figure.

Neither is a gravel-friendly platform. For chip-seal and broken pavement, the Cannondale's extra 2–4 mm of wiggle room is useful.

Two reasons. First, Ultegra Di2 — it's tier-matched to the V4Rs editor's pick, so the spec table compares drivetrains apples-to-apples. Second, Hi-MOD carbon is Cannondale's proper race-grade layup; the LAB71's Series 0 carbon is roughly 100 g lighter on the frame but costs ~$5,000 more.

For most buyers in this comparison, the Hi-Mod 2 at $9,999 is the smarter slot.

The Cannondale SystemBar R-One is a one-piece carbon bar/stem with internal routing. Stem length or bar width changes mean a new unit. Cannondale's Delta Steerer uses standard headset bearings under the integrated front end — a meaningful service win versus proprietary headsets.

The Colnago CC.01 is also one-piece, but Colnago specs CeramicSpeed SLT 'lifetime' headset bearings explicitly to delay the painful disassembly that integrated routing usually requires. Neither is friendly for casual fit tweaks; both are designed assuming you'll set them once and leave them.

At the fit-picked sizes (SuperSix 54 vs V4Rs 485), reach is essentially identical (384 vs 383 mm). The differences are everywhere else.

The V4Rs 485 sits 16 mm lower in stack (539 vs 555), runs a 0.3° steeper head tube (71.5° vs 71.2°), 2 mm shorter chainstays (408 vs 410), and a 0.8° steeper seat tube (74.5° vs 73.7°). It's a more aggressive, more-forward position across the board — exactly what its 'pro-bike' reputation implies.

Only the SuperSix. Cannondale sells the SuperSix EVO Carbon 6 with Shimano 105 mechanical for $2,999 and the Carbon 4 with 105 mechanical for $5,499 — both on the same Carbon (not Hi-MOD) frame with identical geometry to the flagship.

The V4Rs has no entry below $7,000 and no aluminum or lower-grade carbon variant. If the badge matters but the budget doesn't stretch, look at the Colnago C68 (lugged Italian frame, smoother ride) or move on to the SuperSix.

Both are robust frames. Cannondale's Gen 4 fixes — threaded BSA BB, downtube Di2 battery port, no steering-stop pin — were direct responses to Gen 3 long-term issues, and reviewers welcomed all of them.

Colnago specifically reinforced the V4Rs's seatstays after seeing ~45% of UAE Team Emirates V3Rs failures occur there; they've since cut the rate to 10–12% per Davide Fumagalli. Both come with manufacturer warranty programs against defects, and both offer crash-replacement pricing — confirm specifics with your local dealer.