It really depends on how you rate players,
Do you rate their ceilings as best prospect?
Do you rate NHL readiness?
For me, I'd rate Tierney high because he's almost there, whereas some people will rate Godolbin high because of his ceiling. Same as the 2015 pair in Meier and Roy, some will rate Meier higher because of the probability of succeeeding to the NHL is very high, whereas others will rate Roy higher because he could potentially become a #1/2 D-Man, not saying Meier can't become a Star either, just probably a lesser chance.
For me I find it hard to seperate our prospects right now, because Burke and DW have done a GREAT job in selecting different kinda prospects,
Mueller is a good Def Dman prospect, Roy is a good Off Dman prospect, Tierney is a great complimentry C prospect, Meier is a safer top 6 Wing prospect with high end skill, whilst Goldobin may turn into nothing, but has that good chance of being a star. But I voted for Meier.