Felt AR Advanced Ultegra DI2 vs Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

Compare Specifications of Felt AR Advanced Ultegra DI2 and Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

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Felt AR Advanced Ultegra DI2
Felt AR Advanced Ultegra DI2

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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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Technical Specifications
Frame TeXtreme carbon fiber, MMC with InsideOut construction, carbon fiber BB386 bottom bracket shell, 12 x 142 mm Syntace style thru axle, flat mount disc brake standard, aluminum replaceable rear derailleur hanger, internal electronic-specific cable routing, and high-frequency vibration reducing seat post insert S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
Stem AR integrated carbon with internal cable and hose routing -6¡ rise, ¯31.8 mm, 48 - 51 cm: 90 mm, 54 - 56 cm: 100 mm, 58 cm: 110 mm, 61 cm: 120 mm Roval Rapide Cockpit, Integrated Bar/Stem
Handle Bar Devox Carbon Aero, 80 mm reach, 125 mm drop, ¯31.8 mm, 48 - 54 cm: 400 mm, 56 - 61 cm: 420 mm Roval Rapide Cockpit, Integrated Bar/Stem
Fork Felt Aero Road UHC Advanced + TeXtreme carbon fiber monocoque construction, AeroTaper 1.125" - 1.25" carbon fiber steerer tube, integrated crown race, crown and blades. Flat mount disc standard, 12 x 100 mm thru axle --
Seatpost Felt VariMount Aero Road UHC Advanced + TeXtreme carbon fiber with high-frequency vibration reducing insert, integrated battery holder, 350 mm length*, 0/20 mm offset *Seatpost can be cut to length S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
Grip -- Supacaz Super Sticky Kush
Crankset Shimano Ultegra R8000, 52/36T, 48 cm: 165 mm, 51 cm: 170 mm, 54 - 56 cm: 172.5 mm, 58 - 61 cm: 175 mm Shimano Dura-Ace R9200, HollowTech II, 12-speed with 4iiii Precision Pro dual-sided powermeter
Chain Shimano 11-speed Shimano Dura-Ace, 12-speed
Shifters Shimano Ultegra Di2 R8070 11-speed --
Saddle Prologo Dimension T4.0 Body Geometry S-Works Power, carbon fiber rails, carbon fiber base
Headset FSA integrated sealed cartridge bearings MR121 {870E-RS} Upper bearing and MR168 {970E-RS} lower bearing with integrated aero headset spacers and integrated top cover for use with non-integrated stem --
Derailleur Front Shimano Ultegra R8050 Di2 braze-on Shimano Dura-Ace R9250, braze-on
Derailleur Rear Shimano Ultegra R8050 Di2 11-speed short cage Shimano Dura-Ace R9250, 12-speed
Hub Front Reynolds Series 1, straight-pull design, 4 pawl, 24T ratchet, 11-speed, 12 x 142 mm thru axle, Center Lock --
Hub Rear Reynolds Series 1, straight-pull design, 12 x 100 mm thru axle, Center Lock --
Spoke Sapim Sprint bladed --
Cassette Shimano 11-speed, 11-30T Shimano Dura-Ace, 12-speed, 11-30t
Chainrings -- 52/36T
Bottom Bracket -- Shimano Dura-Ace, BB-R9200
Tyres
Front Continental Grand Prix 5000 folding, 700 x 25c S-Works Turbo Rapidair 2BR, 700x26mm
Rear Continental Grand Prix 5000 folding, 700 x 25c S-Works Turbo Rapidair 2BR, 700x26mm
Wheel / RIM Reynolds AR58 DB Custom carbon, tubeless ready, 21 mm inner width, 58 mm depth 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
Tube -- Turbo Ultralight, 60mm Front, 80mm Rear, Presta valve
Brakes
Front Shimano BR-R8070 hydraulic disc, 160 mm rotor Shimano Dura-Ace R9270, hydraulic disc
Rear Shimano BR-R8070 hydraulic disc, 140 mm rotor Shimano Dura-Ace R9270, hydraulic disc
Brake Lever Shimano Ultegra R8070, hydraulic Shimano Dura-Ace R9270, hydraulic disc
Suspension
Front -- S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc
Rear -- --
Colors Available
Colors Aquafresh / TeXtreme
White / TeXtreme (Green)
Satin Fog Tint / Green Ghost Pearl / Red Ghost Pearl Fade
Satin Carbon / Viavi Cynan Blue / Viavi Silver-Blue Pearl Fade / Gloss Metallic White Silver


Physical Specs
Length -- --
Weight -- 6.62 kg
Overview
Features -- --
Additional Details Bar Tape : Felt VelvetGel tape with 3 M reflective base with Felt Bubble-Tech F-Wing bar end plugs
Bottom Bracket : Token BB386 with 24 mm bearings
Seatpost Clamp : Felt Internaloc integrated with titanium bolts
Thru Axle : Front: 12 x 100 x 118, thread: M12 x 1.5P x 13L, Maxle; Rear: 12 x 142 x 161 (161L + 9 head = 170 total), thread: M12 x 1.0P x 18L, Syntace
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Accessories - Carbon assembly paste
- Chain plate protector
- Tubeless valve stems
- Aero seatpost slot covers
- Di2 battery charger
- Headset top cover for use with non-integrated stem
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Which one do you think is better? And why?
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