Both managers have been impressive in their respective clubs but Xabi Alonso has made more impact with Bayern Leverkusen than Kompany has made with Bayern Munich. In terms of pressure I agree with you that Kompany will face more pressure with Bayern Munich because any little slip up someone will lose his job not like Xabi who has already made a name for himself with Leverkusen.
Xabi Alonso has done better at Bayer Leverkusen than Vincent Kompany at Bayern Munich even though both are doing well. And youbare right Kompany faces a lot of pressure at Bayern Munich because People expect a lot from him And Small mistakes can cost jobs.
Xabi has built good name at Leverkusen and has More freedom to try new things. Kompany experience playing for Manchester City helps but managing Bayern Munich is tougher. Xabi has advantage but Kompany leadership will be tested.
The difference between the two, besides the pressure issue, Xabi has proven to be successful at Bayer Leverkusen last season while Kompany is still very new at Bayern Munich so he has not proven anything, for now I think Xabi Alanso is still the best of Kompany.
Kompany did have a good season and he adapted quickly to Bayern Munich, that is very natural because he has a good squad and Bayern Munich is a great team, but he also has a lot of pressure at Bayern Munich. This is very different from Xabi Alanso coaching Leverkusen whose squad is as it is but last season they were able to win the Bundesliga trophy without being defeated, this will also be a confidence booster for Xabi Alanso this season to become the main competitor in the Bundesliga trophy fight.
But what is certain is that both of these coaches have a good future and even have the potential to become one of the best coaches and the real test for both coaches is at the end of this month. because the two teams will face each other, so here we can judge who is the best of the two coaches.