Try it yourself: FF vs APS-C vs micro-43
Do you see the difference between an image made with a full frame sensor or a small sensor? Without pixel peeping by blowing the image up to 100% or more?
Visit GuesstheFormat and find out whether you see if a picture is taken with a camera with a large or a small sensor.
Thousands of photographers have gone before you. The statistics are nice, but not unequivocal. For example, the outcome of FF vs APSC (53% correct) differs from the outcome of APS-C vs FF (58% correct). The same applies for other comparisons, like APS-C vs Micro-43 (58%) and micro-43 vs APS-C (47%).
Try it yourself!