In what sense has Wilson played better than Smith?
You and "Fallen R" love to cherry-pick passer rating, because Wilson's play looks good by passer rating, and that happens because passer rating ignores things like sacks and fumbles, and a ton of other things like game situation (score, down and distance, field position) and the quality of the defenses the QB has faced. Every stat has its flaws, but other one-number QB stats like QBR, DVOA, and DYAR do take those things into account, and that's why Wilson is really bad by those metrics, and why what those metrics say jibes with how Wilson's team is performing despite his empty passer rating.
Y'know the baseball player who hits for a batting average that looks good, but he's a slap hitter with almost no power and never takes a walk? People see a batting average of, say, .295 or .301 or something, and think "oh, that guy's not why our team is losing". Never mind that he's hitting .301/.312/.350 (BA/OBA/SLG) and is way below replacement level at his position. Yeah, that's Wilson with his high passer rating.
Smith has so far been worse than Wilson at passer rating. But Smith has been better in completion percentage (Smith all the way down to 13th now, Wilson all the way up to 17th), QBR (Smith 12th, Wilson 21st), DVOA (Smith 9th, Wilson 20th), DYAR (Smith 10th, Wilson 20th), and PFF grades (don't know their current rankings because I don't subscribe to PFF, but Smith was well ahead before this last weekend).
Wilson has been better than he himself was last season, but that's a really low bar. He was bottom-three in the league last season. This season, he's hovering around the top of the bottom third and the bottom of the middle third. Meanwhile, Smith is hanging around the bottom of the top third and the top of the middle third. Smith has been around the edges of the top ten (I'd say just outside, like 11th-13th or so) while Wilson has been around the edges of the bottom ten (I think just outside, around 20th-best in the league or so).
So the gap between Smith's performance and Wilson's performance has indeed narrowed since last year, when Smith was in the lower half of the top ten, while Wilson was in the bottom three, but Wilson hasn't been better than Smith this year.