I found confusing the following type of sentence:
Both work out quite well but the dwarf tends to have a bit more vitality than the elf does.
Why do we use does at the end of the sentence to refer to something previously described using "to have"? It looks a bit misplaced. As a counter-argument, the following equivalent sentence sounds okay:
AWS tends to offer more RAM than Microsoft does as the server instances get large
Is there some principle at play here?