There's a non-negligible chance Wilson ends up better, so I wouldn't be shocked if that ends up the case. But if he does (barring major injury or early retirement like Luck), Lawrence will at least be close behind. The upside on the two is almost the same, but mitigating risk, there's more downside on Wilson.
Generally I'm not a fan of drafting for floor, but if both have off-the-charts ceiling, then I'll definitely take the guy with the safer floor.