You're in the middle of a project and you really need another guy to do urban environment (AA-budget game, you have some other guys doing enviro already). You have those two candidates:
A is clearly good, but is more of a character artist, has no environment in the portfolio.
B has done a lot of varied environment, but it's rather mediocre in terms of quality.
No 'third answers' here, you really need to hire one of those two. Which would be your pick and why? What would be the deciding factor?
(Those are not real portfolios, I just assembled them from random images). If you're not a recruiter you may answer too, of course, just note that you're not a recruiter.