Author Impulse 27.5 ASL 2021-22 vs Felt IA FRD Disc 2020

Compare Specifications of Author Impulse 27.5 ASL 2021-22 and Felt IA FRD Disc 2020

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Author Impulse 27.5 ASL 2021-22
Author Impulse 27.5 ASL 2021-22

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Felt IA FRD Disc 2020
Felt IA FRD Disc 2020

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Technical Specifications
Speed 24 --
Frame Alloy 6061 27.5" (ASL) Felt Integrated Aero Tri Disc UHC Ultimate + TeXtreme carbon fiber, MMC with InsideOut construction, BSA threaded bottom 68mm bracket shell, 12 x 142 mm with Syntace style thru axle, flat mount disc brake standard, horizontal 12 mm thru-axle dropouts, replaceable rear derailleur hanger, internal mechanical or electronic cable routing
Stem AUTHOR alloy Felt Dagger Integrated
Handle Bar AUTHOR 8° 640 / 660 mm Devox Dagger UHC Ultimate + Nano base bar with Devox ƒ-Bend carbon fiber 3-position extensions
Fork Front: RST Gila 27.5 ML lock out (100 mm) Felt Dagger Disc UHC Ultimate + TeXtreme carbon fiber monocoque construction, 1.125" carbon fiber steerer, upper cover, blades, dropouts, crown; internal disc-brake routing, flat-mount disc brake standard, 12 x 100 mm thru axle
Seatpost AUTHOR alloy (31.6) Felt VariMount Aero Aero Tri UHC Advanced carbon fiber, 300 mm length
Grip AUTHOR high density foam --
Crankset -- Shimano Dura-Ace R9100, 52/36T, 48 -51 cm: 165 mm, 54 -56 cm: 170 mm, 58 cm: 172.5 mm
Pedals Resin --
Chain KMC Z8.3 Shimano Dura-Ace,11-speed
Shifters SHIMANO Altus (24) Shimano Dura-Ace Di2 R9160 TT/Tri 11-speed
Saddle AUTHOR Fenix ISM PS1.0 Ti
Headset -- FSA TH-873-CB integrated, 1.125" sealed ceramic ACB cartridge bearings with Felt compression device
Derailleur Front SHIMANO TY700 (34.9) Shimano Dura-Ace R9150 Di2 braze-on
Derailleur Rear SHIMANO Altus Shimano Dura-Ace R9150 Di2 11-speed short cage
Hub Front QUANDO Disc 32 holes Zipp Cognition, 11-speed, 12 mm thru-axle Center Lock
Hub Rear -- Zipp Cognition, 12 mm thru-axle, Center Lock
Spoke Black steel CX-Ray - Black
Cassette -- Shimano Dura-Ace, 11-28T
Bottom Bracket VP COMP cartridge --
Tyres
Front AUTHOR Speed Master 27.5" × 2.00" Continental Grand Sport Race folding, 700 x 25 c
Rear AUTHOR Speed Master 27.5" × 2.00" --
Wheel / RIM Rims: AUTHOR Xenon 27.5 32 holes Zipp 454 NSW Disc carbon front, Zipp 858 NSW Disc carbon rear
Brakes
Front TEKTRO disc hydraulic (6" rotors) Shimano BR-R9170, 140 mm rotor
Rear TEKTRO disc hydraulic (6" rotors) Shimano BR-R9170, 140 mm rotor
Brake Lever TEKTRO WS Shimano Dura-Ace BR-R9170 TT/Tri hydraulic
Suspension
Front -- --
Rear -- --
Colors Available
Colors -- Matte TeXtreme (White)


Physical Specs
Length -- --
Weight 14 kg 8.9 kg
Overview
Features -- --
Additional Details SIZE : 16", 18"
HEAD PARTS: PRESTINE Integrated 1-1/8"
CHAIN WHEEL : PROWHEEL 42-34-24 teeth 170 mm cranks
FREE WHEEL: SHIMANO HG200-8 12-32 (8)
SEAT CLAMP: AUTHOR (34.9)
Bar tape : Felt VelvetGel tape and dimpled gel pads with Felt bar end plugs
Bottom Bracket : Ceramic Speed BSA threaded
Seatpost Clamp : Felt Internaloc integrated with titanium bolts
Thru axle : Front: Devox leverless 12 x 100 x 117L, thread: M12 x 1.5 x 12.5L; Rear: Devox leverless 12 x 142 x 162.5L Syntace style, thread: M12 x 1.0 x 18L
Accessories -- Carbon assembly paste,
Aero seatpost slot covers,
IA CALpac 2.0, Di2 Internal battery charger,
Dagger stem cover with 1/4-turn Garmin Mount,
Valve extenders,
IA BTSpac storage box

Which one do you think is better? And why?
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