Re: Take the best centre prospect. But if the BPA is considerably better, then take the BPA.
I'm very much of the same mindset as
@Amazing Kreiderman. I think a lot of people tend to think of BPA as linear or singular in the sense that everyone comes in with a prospect score and that those scores are clearly defined, with tiers and an obvious winner.
In reality you tend to have clusters and guys in the same range. Different teams might value things differently that could modestly push someone up a tier or down a tier, but for the most part you tend to have a group of players who are more or less seen as having equal value or close enough value.
For shits and giggles lets assume that Pinelli, Coronato and Chayka are all on the same tier. In that situation you could have a scenario where all three guys are ranked 15, 16 and 17 by the Rangers, with Pinelli ranked last (17th) of the trio.
The Rangers aren't necessarily inclined to take the guy ranked 15th, unless there is a pretty obvious gap there. If all guys are more of less ranked the same, they very well could go with the guy ranked 17th if they feel the gap is negligible or deemed to be worth the trade-off.
Teams also rank players differently. I know some teams who give a numerical order to each player, while I know of others who strictly go by tiers. Most use a hybrid system.