It would be great if we could know which scouts are being polled for Bob's list. There are so many different factors that play a part, as in primary focus of scouting (defence, offence, goal tending) area of focus (Europe, SEL, WHL, OHL, QMJHL, NA) organization etc..
Every organization has a vast array of scouts, each will have varying opinions on certain players. It all boils down to a consensus when we talk about 1st round players.
Lets assume Bob Mckenzie says 2 out of 10 are Laine, 2 out of 10 thought hard but picked Matthews, and 6 said Matthews. The consensus among whomever these scouts are, have Matthews 1st oa.
This same methodology will apply to each NHL organization. Poll their scouts, weighting each opinion based on knowledge of said player. I'm sure there are a lot of organizations that will have a number of their scouts with Laine ahead of Matthews, but if 6-8 out of every 10 scouts are saying Matthews then its a near guarantee he will go first overall.