Harder as in more difficult.
It's a modified puzzle that tests your reasoning abilities and the size of your
immediate attention span, as in how far can you read into the puzzle without
losing the meaningful tread of logical continuity.
I find your question a bit confusing. Did you mean "harder" as in "more
difficult
to uplift" or "harder" as in "not as soft as the previous creature", or perhaps
"has
a more negative disposition"?
-Ken