Unlike the others who posted before me, I have noticed a performance increase with the lower lpr settings. I have owned around 10 dms and everyone that had a bwing bolt in it was noticeably smoother and quieter than the stock bolt when both properly tuned.
But as for the bwing bolt being worth it, you can send your bolt to be polished or polished and annodized which will have the same results for 30-45$ depending on if you want it annodized or not. As for your possibly next question, a pure polished bolt will be softer and be able to yield a lower lpr setting. The down side to this is it will wear faster if you don't properly maintain bolt or get stuff in your breech.
Hope this helps