of the two I would prefer Vrabel and the experience. Someone who has proven they can do the simple things right like manage the clock or challenge a play.
Johnson may be a star, but I have nightmares of Nagy 2.0 (unwilling to bend. what, they are bad against the run? I'm gonna pass! 'cause MY WAY!) then there was Trestman. Basically, we haven't done will with an offensive HC since Ditka and what our okay defensive coaches have mostly missed was a good QB and we have that now, so that with a top 5 D and we're a consistent playoff team.
That said, whoever we get, Vrabel, Johnson, or Kevin Warren's challenged nephew, I'll root for them because I'm an old Bears fan fool.