The advantage of Vrabel is that he has reasonably successful experience as a head coach. The downside, for some, is his background in defense, The advantage of Johnson is that he seems to have a brilliant mind for offense. The downside is that he has no experience as HC and may be something of a detail-oriented egghead who might struggle to be sufficiently forceful as a leader of men in a violent sport.
I am left being equally content with either choice. I certainly hope the process favors neither candidate, given that there is every likelihood either might decline an offer in light of the appeal of alternative options likely to present themselves.
If neither in the end is willing or available to us, the next set of alternatives seems significantly inferior. i suspect that would leave us with an offense-minded newbie lacking in HC experience, the sort of option which might work or might not, and who is less likely than an experienced option to bring along a strong coaching group and - important to me - to insist that Wolf be tossed or marginalized in favor of his own GM option.