Full frame vs APS-C sensor Mirrorless camera image quality quick comparison - A7 vs A6300

Just did a quick test, both shot in similar settings, indoor with one light on the side.

Testing lenses: Sony 28-70mm full frame kit lens & Samyang 85mm f1.4 lens (shot at f 2.0)

I use one camera to shoot another camera and viceversa

All images cropped to close up to the camera despite different focal length

Image exposure slightly adjusted in Lightroom

Spoiler alert

A6300 did better

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A7 28mm



A6300 28mm




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A7 70mm



A6300 70mm



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A7 85mm



A6300  85mm



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Full frame lens should perform worse on crop body(according to Tony Northrup's video)? But here A6300 absolutely outperformed it's older brother in this particular setting.

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update

it just occur to me that it might be because crop body magnify the focal length therefore the camera shoots closer to the object, just look at the images shot on 28mm and 70mm, 70mm is significantly sharper, merely because the focal length is longer and it gets a much close-up shot. A new test is needed...