I wonder if the problem is simply the zoom viewing size.
Your first picture is displayed at 50% zoom. The second at 300%. When you in zoom that far you may get the appearance of blur while the text is not actually blurred.
I did a test with the same font and size. Text looks OK at normal size 100%, looks like yours at 300%.
Try viewing your second picture at actual size 100%. I'm guessing it looks OK and will print OK.