Gh4 ou Gh5 en occasion

Hello,

Je fais des vidéos et je cherche un bon appareil mais avec un budget serré (900 euros objectif inclus).
Initialement parti sur le GH5, j'ai vu que le GH4 offre des prestations également interressantes.
Entre les deux, qu'est-ce qui ferair la différence pour un amateur qui souhaite faire principalement de la vidéo sur trépied, et occasionnellement de la photo.
Merci par avance pour vos retours.

DP review au lancement du GH5
"The GH5's feature set moves on suitably far from its predecessor that the company says the GH4 will remain in its lineup as a lower-cost option for users who don't need the additional capability that the GH5 brings.

For many users, the addition of in-body stabilization and 4K video without cropping might be enough to make the camera a worthwhile upgrade, but Panasonic has revised and improved almost every aspect of the camera's behavior and performance."

Key Features
20MP Four Thirds sensor (no OLPF)
5-axis in-body image stabilization system with 'Dual IS 2' support
All 4K footage taken using full width of sensor (oversampled from 5.1K footage)
Internal 4K/30p 10-bit 4:2:2 video capture
4K/59.94p and 50p shooting with 10-bit 4:2:2 output or 8-bit, 4:2:0 internal recording
1080 video at up to 180p, enabling 7.5x slow-motion
9 fps shooting with continuous autofocus
Advanced DFD autofocus
Dual UHS II card slots (V60 ready)
Autofocus point joystick
802.11ac Wi-Fi, NFC and Bluetooth
Pre-configurable rack focus mode
Waveform and vectorscope monitors
Paid upgrade to enable V-LogL video capture with LUT-based preview display