Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 vs Trek Domane ALR 4

Compare Specifications of Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 and Trek Domane ALR 4

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Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2
Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

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Trek Domane ALR 4
Trek Domane ALR 4

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Technical Specifications
Frame S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc 200 Series Alpha Aluminum, IsoSpeed, Invisible Weld Technology, E2 tapered head tube, BB86.5, hidden fender mounts, DuoTrap S compatible
Stem Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Elite, 31.8 mm, 7 degree, with computer & light mounts
Handle Bar Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Race VR-C, 31.8 mm
Fork -- Domane carbon, E2 tapered steerer, direct mount brakes
Seatpost S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset Bontrager alloy, 2-bolt head, 27.2 mm, 8 mm offset
Grip Supacaz Super Sticky Kush Bontrager gel cork tape
Crankset Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter Shimano Sora
Chain Shimano Dura-Ace, 12-speed --
Shifters -- Shimano Tiagra, 10 speed
Saddle Body Geometry S-Works Power, carbon fiber rails, carbon fiber base Bontrager Affinity Comp, chromoly rails
Headset -- Integrated, cartridge bearing, sealed, 1-1/8 top, 1.5 bottom
Derailleur Front Shimano Dura-Ace R9250, braze-on Shimano Tiagra
Derailleur Rear Shimano Dura-Ace R9250, 12-speed Shimano Tiagra
Hub Front -- Alloy
Hub Rear -- Alloy
Cassette Shimano Dura-Ace, 12-speed, 11-30t --
Chainrings 52/36T 50 / 34
Bottom Bracket Shimano Dura-Ace, BB-R9200 --
Tyres
Front S-Works Turbo Rapidair 2BR, 700x26mm Bontrager R1 Hard-Case Lite, 700 x 28 c
Rear S-Works Turbo Rapidair 2BR, 700x26mm Bontrager R1 Hard-Case Lite, 700 x 28 c
Wheel / RIM Front: Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 51mm depth, Win Tunnel Engineered, Roval AFD hub, 18h, DT Swiss Aerolite spokes
Rear: Roval Rapide CLX II, Tubeless, 21mm internal width carbon rim, 60mm depth, Win Tunnel Engineered, Roval AFD hub, 24h, DT Swiss Aerolite spokes
Bontrager Tubeless Ready
Tube Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve --
Brakes
Front Shimano Dura-Ace R9270, hydraulic disc Tektro T731
Rear Shimano Dura-Ace R9270, hydraulic disc Tektro T731
Brake Lever Shimano Dura-Ace R9270, hydraulic disc Shimano Tiagra
Suspension
Front S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc --
Rear -- --
Colors Available
Colors Satin Fog Tint / Green Ghost Pearl / Red Ghost Pearl Fade
Satin Carbon / Viavi Cynan Blue / Viavi Silver-Blue Pearl Fade / Gloss Metallic White Silver
Quicksilver


Physical Specs
Length -- --
Weight 6.62 kg --
Overview
Features -- - The smooth advantage
- Rear IsoSpeed doubles compliance to conquer even the roughest roads
- Lightweight aluminum frame delivers an ultra-efficient ride
- Exceptionally stable geometry and flawless shifting
Additional Details -- Bottom Bracket : PressFit
Rear Cogs : Shimano Tiagra, 11-32, 10 speed

Which one do you think is better? And why?
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