A approximate comparison can be seen with these two images
View attachment 214298the furthest back row in the upper North stand is about halfway to the furthest on the other three sides. Looks slightly more to me, but let's just say half.
View attachment 214299
On this comparison (the roof trusses are what is being built) half way height on the upper tier of the west stand is still the middle of the top balcony of the goodison main stand.
So, although the north looks small, it towers over most of gp. In the footage of the build at the moment, it's still missing the concrete down to pitch level. That will make it look much bigger