If one block in the nether is 8 blocks in the overworld, does that make the nether smaller than the overworld?

The title says it all: If one block in the nether is 8 blocks in the overworld, does that make the nether smaller than the overworld?

I was reading a question about portal science and i was wondering if the nether is smaller than the overworld?

How does this effect portal linking?

No. The world border is the same in both the Overworld and the Nether, so you can access the same amount of land. Although, in normal gameplay, this will not be noticeable(60000000 blocks is a lot!). Executing /worldborder get in both dimensions returns the same result in both dimensions, even if you change the worldborder. Both dimensions are the same size, and big enough to the point that no survival player will(probably) ever get there.