Critical Reasoning (CR) | Re: Boreal owls range over a much larger area than do other owls

Here I have two sentences.
Could anyone tell me whether the comparison in the two sentences isdifferent?

(1) Boreal owls range over a much larger area than do other owls of similar size.
(2) Some boreal owls range over an area eight times larger than the area over which any other owl of similar size ranges.

I have been told that the second sentence is comparing different groups of boreal owls, while the first one is making a comparison between boreal owls and other owls.
Also, the OG solution