Author Rival 27.5 ASL 2021-22 vs Felt FR Advanced Ultegra DI2 2020

Compare Specifications of Author Rival 27.5 ASL 2021-22 and Felt FR Advanced Ultegra DI2 2020

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Author Rival 27.5 ASL 2021-22
Author Rival 27.5 ASL 2021-22

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Felt FR Advanced Ultegra DI2 2020
Felt FR Advanced Ultegra DI2 2020

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Technical Specifications
Speed 24 --
Frame Alloy 6061 27.5" (ASL) Felt Race Road UHC Advanced + TeXtreme carbon fiber, MMC with Inside Out construction, carbon fiber BB386 bottom bracket shell, 12 x 142 mm Syntace style thru axle, flat mount disc brake standard, CNC aluminum replaceable rear derailleur hanger, external mechanical or internal electronic cable routing
Stem AUTHOR alloy Devox SL, -7¡ rise, ¯31.8 mm, 43 - 47 cm: 80 mm, 51 cm: 90 mm, 54 - 56 cm: 100 mm, 58 cm: 110 mm, 61 cm: 120 mm
Handle Bar AUTHOR 8° 640 / 660 mm Devox Carbon Variable Shape, 65 mm reach, 125 mm drop, ¯31.8 mm, 43 - 47 cm: 38 cm, 51 cm: 40 cm, 54 - 56 cm: 420 mm, 58 - 61 cm: 440 mm
Fork Front : RST Gila 27.5 ML, lock out (100 mm) Felt Race Road UHC Advanced + TeXtreme carbon fiber monocoque construction, size specific Control Taper carbon fiber steerer tube, integrated crown race, crown and blades. Flat mount disc standard, 12 x 100 mm thru axle
Seatpost AUTHOR alloy (31.6) Devox UHC Performance carbon fiber with microadjust head, 43 - 51 cm: ¯27.2 mm x 294 mm length, 54 - 61 cm: ¯27.2 mm x 344 mm length
Grip AUTHOR high density foam --
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
Pedals Resin --
Chain KMC Z8.3 Shimano 11-speed
Shifters SHIMANO TX800 (24) Shimano Ultegra Di2 R8070 11-speed
Saddle AUTHOR Fenix Prologo Dimension T4.0
Headset -- FSA integrated sealed cartridge bearing with Felt Variable Height Cone Spacers (20 mm PC, 4.5 mm aluminum), Felt top cap, 43 - 47 cm: IS-21, 1.125", 51 - 54 cm: No.382, 1.125 - 1.25", 56 - 61 cm: No.42, 1.125 - 1.5"
Derailleur Front SHIMANO TY700 (34.9) Shimano Ultegra R8050 Di2 braze-on
Derailleur Rear SHIMANO TX800 Shimano Ultegra R8050 Di2 11-speed short cage
Hub Front QUANDO Disc 32 holes 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 Black Steel Sapim Sprint double butted
Cassette -- Shimano 11-speed, 11-30T
Bottom Bracket VP COMP cartridge --
Tyres
Front AUTHOR Speed Master 27.5" × 2.00" Vittoria Rubino Pro G+ folding, 700 x 25c
Rear AUTHOR Speed Master 27.5" × 2.00" Vittoria Rubino Pro G+ folding, 700 x 25c
Wheel / RIM RIMS: AUTHOR Xenon 27.5 32 holes Reynolds AR41 DB Custom carbon, tubeless ready, 21 mm inner width, 41 mm depth
Brakes
Front TEKTRO disc mechanical (6" rotors) Shimano BR-R8070 hydraulic disc, 160 mm rotor
Rear TEKTRO disc mechanical (6" rotors) Shimano BR-R8070 hydraulic disc, 140 mm rotor
Brake Lever SHIMANO TX800 Shimano Ultegra R8070, hydraulic
Suspension
Front -- --
Rear -- --
Colors Available
Colors -- Aquafresh / Matte TeXtreme
Plasma Red / TeXtreme


Physical Specs
Length -- --
Weight 15 kg 7.28 kg
Overview
Features -- - Advanced-level frameset with TeXtreme carbon
- Clearance for up to 28 mm tires
- Electronic shifting and disc brakes
Additional Details SIZE : 14", 16", 18"
HEAD PARTS: PRESTINE Integrated 1-1/8"
CHAIN WHEEL : PROWHEEL 42-34-24 teeth 170 mm cranks
FREEWHEEL : SHIMANO HG200-8 12-32 (8)
Bar Tape : Felt Velvet Gel tape with 3M reflective base with reflective Felt Bubble-Tech F-Wing bar end plugs

Bottom Bracket : Token BB386 with 24 mm bearings

Seatpost Clamp : Felt single bolt, ¯30.6 mm

Thru Axles : Front: 12 x 100 x 123, thread: M12 x 1.5P x 16L, Maxle; Rear: 12 x 142 x 163 (163L + 7 head = 170 total), thread: M12 x 1.0P x 19L, Syntace
Accessories -- Carbon assembly paste
Chain plate protector
Tubeless valve stems
Di2 battery charger

Which one do you think is better? And why?
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