It's not a matter of opinion though. PK literally has had a better season. It's an objective fact.
In terms of stats and offense generated, yes.
In terms of doing the little plays that help your team win and being a stabilizing factor, no way.
Kulikov showed he could be relied upon to be deployed in almost any scenario and with almost any partner and provide solid defense. The most obvious thing we have been lacking this past three years are guys who can settle our zone down and get the puck out of danger.
Vats, subban, And to a lessor degree severson are all high risk high reward, and they have wrought literal chaos upon this team. Murray early, and Smith breaking up 2-on-1s the right way was a first for Severson in a partner, so his game went from good last year to great this year.
The other guys' deficiencies were masked by their partners ( unless Vats played with butcher...then they were both coned) and Kulikov made Subban a viable option on defense.
Pk still spent time on his belly flailing around, and couldn't break up a pass to save his life, but he skated better, carried the puck well and actually shot it this year.
In the right situation, he could be a very valuable piece to the right team... but we are two+years and three defensemen away from being that team...including a partner for him that can cover,
But he was not better than Kulikov, who was exactly what this team needed and got.