Felt B Performance Ultegra Mix vs Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

Compare Specifications of Felt B Performance Ultegra Mix and Specialized S-Works Tarmac SL8 - Shimano Dura-Ace Di2

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Felt B Performance Ultegra Mix
Felt B Performance Ultegra Mix

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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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Model:

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Technical Specifications
Frame Felt Aero TT/Tri UHC Performance carbon fiber, MMC with Inside Out construction, 68 mm BSA threaded bottom bracket shell, horizontal dropouts with integrated dropout adjusters, internal mechanical or electronic cable routing S-Works Tarmac SL8 FACT 12r Carbon, Rider First Engineered™, Win Tunnel Engineered, Clean Routing, Threaded BB, 12x142mm thru-axle, flat-mount disc
Stem Devox Tri, ±17¡ rise, ¯31.8 mm, 47 cm (650c) : 60 mm, 51 cm: 80 mm, 54 - 56 cm: 90 mm, 58 cm: 100 mm, 61 cm: 110 mm Roval Rapide Cockpit, Integrated Bar/Stem
Handle Bar Devox Bayonet 3.1 base bar with Devox Ergomod extensions, ¯31.8 mm, 48 - 51 cm: 390 mm, 54 - 58 cm: 420 mm Roval Rapide Cockpit, Integrated Bar/Stem
Fork Felt Aero TT/Tri UHC Performance carbon fiber blades and dropouts, 1.125" aluminum steerer tube --
Seatpost Felt DA/B Aero UHC Advanced carbon fiber, 350 mm length S-Works Tarmac SL8 Carbon seat post, FACT Carbon, 15mm offset
Grip -- Supacaz Super Sticky Kush
Crankset Shimano 105 R7000, 52/36T, 48 -51 cm: 165 mm, 54 -56 cm: 170 mm, 58 cm: 172.5 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 microSHIFT TT 11-speed --
Saddle Prologo Nago Evo Tri40 T2.0 Body Geometry S-Works Power, carbon fiber rails, carbon fiber base
Headset FSA integrated sealed cartridge bearing with Felt Variable Height Cone Spacers (20 mm PC, 4.5 mm aluminum), Felt top cap, IS-21, 1.125" --
Derailleur Front Shimano Ultegra R8000 braze-on Shimano Dura-Ace R9250, braze-on
Derailleur Rear Shimano Ultegra R8000 11-speed short cage Shimano Dura-Ace R9250, 12-speed
Hub Front Devox TTR4, 100 mm QR, 24H --
Hub Rear Devox TTR3, sealed cartridge bearing, 11-speed, 130 mm QR, 28H --
Spoke 2.0 mm stainless steel --
Cassette Shimano 11-speed, 11-28T Shimano Dura-Ace, 12-speed, 11-30t
Chainrings -- 52/36T
Bottom Bracket -- Shimano Dura-Ace, BB-R9200
Tyres
Front Vittoria Zaffiro Pro Slick folding, 700 x 23c, 47 cm: Vittoria Rubino G+, 650 x 23c S-Works Turbo Rapidair 2BR, 700x26mm
Rear Vittoria Zaffiro Pro Slick folding, 700 x 23c, 47 cm: Vittoria Rubino G+, 650 x 23c S-Works Turbo Rapidair 2BR, 700x26mm
Wheel / RIM Devox 30A, tubeless compatible, 17 mm width, 27 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 105 R7000 dual pivot caliper Shimano Dura-Ace R9270, hydraulic disc
Rear TRP T822 TT direct mount caliper brake Shimano Dura-Ace R9270, hydraulic disc
Brake Lever Aero TT/Tri Shimano Dura-Ace R9270, hydraulic disc
Suspension
Front -- S-Works FACT 12r Carbon, 12x100mm thru-axle, flat-mount disc
Rear -- --
Colors Available
Colors Matte Obsidian Grey (Aquafresh) 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 8.82 kg 6.62 kg
Overview
Features - Carbon fiber frame and fork
- Aerodynamically optimized design
- Exceptional handling and fit customization
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Additional Details Bar Tape : Devox Gel tape and new EVA arm pads with anti-microbial cover
Bottom Bracket : Shimano Hollowtech BSA threaded
Seatpost Clamp : Felt Aero Integrated DA/B
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Accessories Carbon assembly paste --

Which one do you think is better? And why?
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