MEGAZOOM Battle! Canon R5 + 100-500 vs Sony A1 + 200-600 In The Field! Does FLEXIBILITY beat REACH?

So many INSANE results to share with you guys! Canon R5 & RF 100-500 vs Sony A1 & FE 200-600, which combo has the EDGE for bird photography? Do the small size & flexibility of the 100-500 starting at 100mm beat the larger Sony 200-600 which can go all the way to 600mm?

Let me know in the comments what you think! Which combo has the edge? Have you used either of them? What's your experience?

A1 vs R5
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R5 Review
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R5 Settings you NEED to Know
   • EOS R5 - The SETTINGS YOU NEED to KNOW  

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Thanks a lot Duncan for lending me your gear!
   / duncangroenewald  

This is the equipment I use:
Canon EOS R5
https://amzn.to/2FV1Fpq
Canon EOS R6
https://amzn.to/3qOtEbQ
Canon RF 100-500 L IS
https://amzn.to/3liEIx0
RF Extender 1.4x
https://amzn.to/3bMD5nO
RF Extender 2x
https://amzn.to/3cuMdwD
RF 800 F11
https://amzn.to/3ldq6Pr
RF600 F11
https://amzn.to/3bIBrDJ
Canon EOS 5D Mark IV
https://amzn.to/2ToffWf
Canon 600 L IS III (I have v. II)
https://amzn.to/3dZM7wn
Canon EF 5.6/400 L
https://amzn.to/2AJwbQk
Canon 1.4x TC III
https://amzn.to/2T7vAhz
Canon 2x TC III
https://amzn.to/3fPnYdr
Canon 600 EX - RT
https://amzn.to/3czhDRf
Wimberley Head II
https://amzn.to/3dOuqzI
Gitzo 5543LS (new version of my tripod)
https://amzn.to/3dRfxg3
Wimberley Flash Bracket
https://amzn.to/2LweMg5
Wimberley M-6 Extension Post
https://amzn.to/2LxCvfQ
Better Beamer (check for compatibility)
https://amzn.to/2AxbbfF
Flash Battery (Godox & Flashpoint is the same)
https://amzn.to/3fNDWVD
Power Cord
https://amzn.to/3cBJGzt
Y connector
https://amzn.to/2X22zoT
Novoflex STA-SET
https://amzn.to/2y5s1Bt
LensCoat LensHide
https://amzn.to/3bAkoAo
LensCoat Lens Hoodie
https://amzn.to/3fStHiI
Canon 2.8/70-200 II
https://amzn.to/3cArBSB
Canon 4/24-70
https://amzn.to/2AwjeJE
Canon 4/16-35 L IS
https://amzn.to/3fPqPDb
JBL Clip3 Speaker
https://amzn.to/36225D5
Sandisk Extreme Pro CFexpress Card type B 512GB
https://amzn.to/38FPKHg
Sandisk Extreme Pro
https://amzn.to/2WXKt7n
Panasonic Eneloop Pro
https://amzn.to/2X2SQ1q
Minox 8x43
https://amzn.to/2Z7YxxQ
Canon LP-E6N
https://amzn.to/3byTSYg
Manfrotto Mini Ballhead
https://amzn.to/3dR2pYm
FStop Gear Sukha Backpack
https://amzn.to/2Q3e4fZ

TIMESTAMPS:
0:00 Intro
2:08 Weight & Size
2:35 Internal/External Zoom
3:37 f-Stop
3:52 Lens Foot
4:41 Lens Hood
5:27 Filters
6:04 Control Ring/Buttons
6:34 Issue with Sony buttons
7:30 Minimum Focusing Distance
8:10 Image Stabilisation
8:40 Huge Difference for Video
10:03 Active Steady Shot
10:58 Autofocus
10:03 Image Review
13:54 Image Review Extenders
16:06 Issue with Extender on 100-500
17:35 Which combo is better with extenders?
18:03 Image Review - Action
18:59 Image Samples
20:30 Eye AF difficulty
21:55 Image Review Favourite Image
22:15 Edited Image
22:42 100 vs 200mm - huge difference!
23:48 Flexibility 100-500! Sample
24:06 100 vs 200mm Sample
25:22 200-600 isn't 600mm??
27:03 Issue explained
28:42 Sony shorter at 500mm than Canon?
29:00 What's worse not having 100 or 600mm?
29:47 Which one is the one for you/me?
31:01 Pricing
31:47 Final Thoughts