Why do you insist on centering text?
This is a real-life slide, part of a deck presenting alternative business cases.
Notice how everything is centered. I know that PowerPoint defaults to centered headings so I can understand a centered title ( though generally, I have a preference for left-aligned) but certainly not centered bullet items!
Here is a very simple make-over using PowerPoint SmartArt graphics to make the slide more readable. If you want to show two options, the easiest way is to make two columns and use different colors. I used the same font everywhere and did not use italics.
How would you have restyled the slide?