Canon 90D Slow Motion vs 4k Quality

Filmed with 90D in low light, cloudy conditions at 120FPS and 4K 30fps (downsized to 1080p). Notice slow motion isn’t as sharp and had noise (perfect sharpness peaking on an external monitor). 4K is very sharp, all manual focus (YT downgrades the image). The 4k alone makes it worth upgrading from 80D! Edited and color corrected in Premiere. Shot with 100-400ii with extender. Let me know if you have any questions.