Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 vs Trek Chelsea 8 - Womens

Compare Specifications of Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2 and Trek Chelsea 8 - Womens

Selected Bikes

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

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Trek Chelsea 8 - Womens
Trek Chelsea 8 - Womens

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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 Trek custom steel
Stem Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Race Lite
Handle Bar Roval Rapide Cockpit, Integrated Bar/Stem Bontrager Urban
Fork -- Trek high-tensile steel
Seatpost S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset Bontrager
Grip Supacaz Super Sticky Kush Bontrager Satellite
Crankset Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter Aluminum
Pedals -- Aluminum
Chain Shimano Dura-Ace, 12-speed --
Shifters -- Shimano Altus
Saddle Body Geometry S-Works Power, carbon fiber rails, carbon fiber base Bontrager H1 WSD
Derailleur Front Shimano Dura-Ace R9250, braze-on --
Derailleur Rear Shimano Dura-Ace R9250, 12-speed Shimano Acera
Hub Front -- Formula
Hub Rear -- Formula
Cassette Shimano Dura-Ace, 12-speed, 11-30t --
Chainrings 52/36T 45 T
Bottom Bracket Shimano Dura-Ace, BB-R9200 --
Tyres
Front S-Works Turbo Rapidair 2BR, 700x26mm Bontrager AW1 Hard-Case Lite, 700 x 32 c
Rear S-Works Turbo Rapidair 2BR, 700x26mm Bontrager AW1 Hard-Case Lite, 700 x 32 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
Aluminum
Tube Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve --
Brakes
Front Shimano Dura-Ace R9270, hydraulic disc Tektro Novela Disc
Rear Shimano Dura-Ace R9270, hydraulic disc Tektro Novela Disc
Brake Lever Shimano Dura-Ace R9270, hydraulic disc Tektro aluminum
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
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Physical Specs
Length -- --
Weight 6.62 kg --
Overview
Features -- --
Additional Details -- Rear Cogs : SRAM PG-8320, 8-speed: 11-32

Which one do you think is better? And why?
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