Boost mode doesn't give "cleaner graphics". As cringey as that sounds ("graphics" isn't even an actual term), boost mode can only improve performance in certain titles. Some are significant, some barely noticeable, some not at all.

The upgrade is not worth it right now because what Sony promised with Pro, they haven't delivered:

1) Downsampling or supersampling, there has been an increasing number of games that simply do not provide this. It's retarded.

2) Better performance for Pro games, in some cases - yes. Nioh and Nier most recently benefits from the Pro's performance significantly. However, in many cases, the performance difference isn't really that significant at all.

3) With the MS scorpio coming out soon, it's pretty much a given Sony will drop the price of the Pro soon after. The scorpio's release is only like 4-5 months away, if you can wait - then wait.