Studi of course has the latest info's as he flys with them (iirc).
It seems to be pretty common to move from one LH company to the others, with the exception of Cityline which is its own special case. A couple of my friends started with Condor on the 757 after school (was in Bremen as well). One still flies there, the others all changed to other parts of LHs imperium, one did a one year stay on the MD11 at cargo then moved on to the A340 at classic as SFO and now has an offer as CPT at Germanwings, all within 6 years. Another just went from Condor to classic directly onto the A340 fleet at classic. Another one started out at Cityline and joined classic after 2 years on the A300 and was recently trained on the A340 as well. Condor could be something to avoid though, as there are talks about it being sold in the near future, moreover it is really two companies as well, Condor and Condor Berlin, the latter only operating A320 while the former operates a mix of 757-300 and 767.