One has Lincoln saying what he “would” do, the other has him saying what he “will” do.
One says “fugitives”, the other says “Fugitive Slaves” (in bolded font, no less).
One puts qualifiers on the hypothetical legislation for fugitives, the other does not.
One is the words of Lincoln in 1854, the other is manufactured propaganda (as if it were the words of President Lincoln.)
I’ve read them. One says slaves. The other says “their fugitives”. It’s clear that “their fugitives” are......slaves!
There’s nothing else relevant. None of the qualifiers about a free man for example are relevant. He supported/endorsed fugitive slave legislation. There simply is no meaningful difference.