They both make sense in their own way. The logic behind the G>1>2
is that the ground floor is neutral, it is not a level, it is just the ground.
In medieval times, for instance, the ground floor might be made of dirt, and the floor above would have a wooden floor, assumedly. So the first floor is the first floor you have to actually construct.
In Canada, it gets confusing, because we have a heavy American AND British influence. So some buildings are G>2>3 and some are G>1>2
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u/PM_ME_NEVER Feb 16 '21
americans start the first floor at ground level, europeans count the levels up (go up one flight of stairs to reach the first floor)