Sony A7IV vs Sony A7III - How big is the difference?

Sony A7IV vs Sony A7III - How big is the difference? Sony A7 IV - Sony A7 III - Sigma 24-70mm F2.8 DG DN - Tamron 28-75mm F2.8 Di III VXD G2 - Sony FE 24mm F1.4 GM - Sony FE 20mm F1.8 G - Shot on: Sony A7R IV A - Sigma 24-70mm F2.8 DG DN - Sony FE 90mm F2.8 Macro G OSS - Moza Slypod - Tripod: iFOOTAGE TC5 - Tripod Head: iFOOTAGE Komodo K5 - Falcon Eyes RX-18TD - LED Light - More videos: My 5 Lens Kit for Sony A7III / A7S III / A7C [ E-mount ] Sony A7 IV Review - One Step from Hybrid Perfection Sony A7C Review After the Hype: Master of Packaging Sony A7R IV A - Long Term Review My Favorite Lenses