Well I haven’t had the Touch Bar before , I’ve heard it’s kind of a hate or love thing - would you say it’s something worth paying extra for?
Without a doubt, you will be happier with the MBP as it's a better overall package. The touch bar is tolerable for most people though most agree that it is a gimmick. The fact that you have to get BetterTouchTool to make it useful speaks volumes in how mediocre it is. However, I wouldn't use that as a deal breaker because there are other points to consider between MBA vs MBP.