I got 41 of these miniifigures over this week, all bought at Real (who usually have one or two boxes of minifigs on sale, but this time they put out four or five boxes, and they were being sold as early as Thursday evening). First I bought one of Loew (that one indeed was quite easy to find) and one of a random footballer (who turned out to be Mustafi); next day I bought 35 more, picking more or less randomly (I didn't try to feel for anything at that time) every second bag from a (freshly opened) box. Still was missing a minifigure of Hoewedes after that (and if I managed to find two of them plus one of Mueller plus one of Neuer I would get two full sets plus some spares). On the other hand, I managed to randomly pick (all) three figures of Loew out of that box :-) Then I found the post about the bump codes which I had thought weren't really reliable, and decided to try it this time - feeling for the distinctive hairpieces in order to confirm (even though those of Mueller and Hoewedes' differ by colour only; Neuer, on the other hand, can be distinguished from all others with some certainty). Bought four minifigs - the codes worked for Hoewedes (got two of them) and for Neuer (that one I was quite sure about after feeling the hairpiece). Got another Hummels instead of Mueller though (again the same hairpiece in different colours) - as I saw later the bump code indeed didn't match that of Mueller according to the post earlier, it had an additional horizontal bar on the right as for Hummels, but that bar was nearly impossible to see. I'm still going to try finding out another Mueller and finish the second set. :-)
Interesting, this appears to be my first post here, after a while of just reading :-)