No, Xabi Alonso will never be the same as the Xavi who is currently coaching Barcelona, Xavi got it all he had the perfect squad but this season they failed they couldn't play well enough.
Even though this happened because several players were injured, great coach will always be able to make the best of the situation and conditions.
Meanwhile, Xabi himself started from scratch, he built Leverkusen into really strong team from the bottom and just look at how Leverkusen has developed in the last few seasons, Leverkusen can really perform well while under Xabi control.
When Xabi was with Real Madrid, it was hoped that he could make Real Madrid the same as Leverkusen, where they performed well and were able to be at the top in every competition they participated in.
Maybe Leverkusen will be very busy later because they have to find replacement coach who might be on par with Xabi.
Well, that what Xabi must give to Leverkusen and of course everyone hopes for Leverkusen big achievements at the end of his career as Leverkusen coach if he will replace Ancelotti in the near future.
Comparing Xabi and Xavi based on their performances with their respective teams won't be fair because these teams weren't on the same level. Leverkusen when Xabi took over had to start from scratch to build up to where they are now but Barcelona has more advantages and quality squad but Xavi failed to capitalize on his assets.
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So far Xabi has been a good boss and his methods have worked perfectly for Leverkusen. One would wonder how he managed to put up such feat for the team considering the spot he picked them from. It's one quality that can definitely be found in a good manager. Leverkusen have been impressive in all rounds and it's surprising that they're now better than some already grounded teams. It only means that Xabi has a unique managing quality which can be of essence in bigger teams too.