If you mean handegg the fields MAY be roughly the same since they’re synthetic but in real football the fields are not even the same size, let alone the ground itself. The grass is cut to different length, the substrate may be softer or harder, there may be large patches of grass missing… the list goes on and on.

Others have mentioned a long list of other factors that apply to any sport, but there’s also different lighting, and reference points that you acquired after playing in the same arena many times.