Not sure how you could confidently say Arsenal will beat Bayern when they struggled massively against a very weak Porto side. I dont particularly rate Tuchel but he seems to know how to win in Europe, you can't the same for Arteta who has already overseen some dreadful displays in the Europa and then lucky to beat the worst side left in the CL in the knockouts.
Plus the Harry Kane hype will make it a much bigger, more intense occasion. Its a lovely draw for us, couldn't have gone any better.