Craig was very limited for this level of competition athletically. He was a solid backup for a few minutes, played below the rim, shot ok, and as stated above, his poise was his best asset.
Vital can do a lot more offensively. I would be disappointed if he wasn't a lot more. Austrie was not really a UConn level player in terms of talent but he did fine due to smarts and need (we weren't deep at guard those years). I have no ill will to Craig - he was more of a lower D-1 talent than UConn level (and I would have died to have his talent as an older guy who still tries to ball). Vital is very athletic and can shoot it. I would be surprised if he didn't start here or at least be a super sub a la Gwynn or Vinnie Johnson back in the day for the Pistons. I think guys with his competitiveness find a way onto the court, I would be surprised if he didn't carve out a role this year even.
Further, Craig was more of a quiet guy. Christian seems to play with a lot of fire and has that "missing ingredient" we lacked on last year's team according to one of the few reputable gurus in Corey Evans. So on many levels I don't see the comparison.