Bayer Leverkusen have bigger shoes to wear this time around because now their focus is actively divided although last season it was also but this time around it will be the champions league of which they might not be able to Stand most of the top teams there and when you are playing and then you constantly lose games then the form and mentality of the team also deteriorate to a very big extent.
There's nothing different, they were have Europa League in the last season, so it's only change from Europa League to Champions League. The opponents are stronger, but the schedule is same. Looking at their performance, I really doubt they can able to make it to round of 16.
They aren't as strong as in the last season, similar to Napoli.