Felt IA FRD Ultimate Dura-Ace Di2 vs Viathon R.1 105

Compare Specifications of Felt IA FRD Ultimate Dura-Ace Di2 and Viathon R.1 105

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Felt IA FRD Ultimate Dura-Ace Di2
Felt IA FRD Ultimate Dura-Ace Di2

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Viathon R.1 105
Viathon R.1 105

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Technical Specifications
Drivetrain 2x11-speed --
Frame Felt IntegratedAero Disc 1.0 UHC Ultimate + TeXtreme carbon fiber VIATHON R.1 ROAD FRAME FULL CARBON
Stem Felt Dagger Direct SuperLite aluminum ZIPP SERVICE COURSE, 31.8 MM, 6°, 110 MM
Handle Bar Basebar: Devox Dagger Direct UHC Ultimate + Nano / Extensions: Devox ƒ-Bend | carbon fiber, 3-position ZIPP SERVICE COURSE 70 ERGO
Fork Felt IntegratedAero Disc 1.0 - Dagger UHC Ultimate + TeXtreme carbon fiber VIATHON R.1 ROAD FORK FULL CARBON
Seatpost Felt Aero TRI IL 1.0 VM | UHC Advanced + TeXtreme carbon fiber ZIPP SERVICE COURSE, 27.2 MM, 350 MM
Grip Felt Dimpled gel pads, Felt VelvetGel tape, and Felt bar end plugs --
Crankset Shimano Dura-Ace R9100, 52/36T SHIMANO 105 FC-R7000 50-34T
Chain Shimano Dura-Ace HG901 SHIMANO CN-HG601-11
Shifters Basebar: Shimano Dura-Ace Di2 R9180, TRI/TT / Extensions: Shimano Dura-Ace Di2 SW-R9160, TRI/TT SHIMANO 105 ST-R7020
Saddle ISM PS1.0 Ti FIZIK ANTARES R5
Headset IS (IS-2) --
Derailleur Front Shimano Dura-Ace R9150 Di2, braze-on SHIMANO 105 FD-R7000
Derailleur Rear Shimano Dura-Ace R9150 Di2, short cage SHIMANO 105 RD-R7000
Cassette Shimano Dura-Ace R9100, 11-28T SHIMANO 105 CS-R7000 11-28T
Bottom Bracket CeramicSpeed BSA for Shimano Road ROTOR PRESS FIT 4624
Tyres
Front Continental Grand Prix 5000 TL, 700 x 25c CONTINENTAL ULTRA SPORT II, 700 X 25
Rear Continental Grand Prix 5000 TL, 700 x 25c CONTINENTAL ULTRA SPORT II, 700 X 25
Wheel / RIM ZIPP 454/858 NSW Carbon Tubeless Disc-brake, SRAM/Shimano MAVIC AKSIUM DISC CENTERLOCK
Brakes
Front Disc, Flat Mount 140 mm minimum rotor SHIMANO SM-RT70 160 MM
Rear Disc, Flat Mount 25 mm thickness, 140 mm minimum rotor SHIMANO SM-RT70 160 MM
Brake Lever Shimano Dura-Ace R9180, TRI/TT, hydraulic SHIMANO 105 ST-R7020
Suspension
Front -- --
Rear -- --
Colors Available
Colors -- Copper
Silver


Physical Specs
Length -- --
Weight 9.02 kg --
Handlebar Width 420 --
Overview
Features -- - Shimano 105 components deliver affordable refinement
- Mavic Aksium wheels deliver speed and durability
- Internal cable routings reduce aerodynamic drag
- Zipp Service Course alloy bar and stem offer precision and strength
Additional Details Sizes : 5 | 48, 51, 54, 56, 58cm
Derailleur Hanger Type Front : Brazed-On integrated backup plate, non-replaceable, aluminum
Derailleur Hanger Type Rear : Standard Mount | TA 12x142 TRI/TT, horizontal, replaceable, aluminum
Protector Type : Steerer stop integration for head tube protection / Felt ChainPlate for chain suck protection / Clear vinyl for chain slap protection
Head-Tube Type : Felt Aero 1.125"
Routing Type : Semi-Hidden convertible for electronic or mechanical
Brake Calipers : Shimano Dura-Ace R9170, hydraulic disc, flat mount
Sizes : 52, 54, 56, 57.5, 59
Front Axle : 12MM X 100MM QUICK RELEASE THRU-AXLE
Rear Axle : 12MM X 142MM QUICK RELEASE THRU-AXLE
Inner Tubes : KENDA PRESTA
Bar Tape : FIZIK WHITE

Which one do you think is better? And why?
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