These are absolutely my prefered Langematik's too :
Langematik Anniversary, platinum, limited edition 500 - Reference 302.025 - caliber L.921.7.
Langematik Wempe, platinum, limited edition 100 - Reference 304.048 - caliber L.921.6.
I love them both ! Both stunning pieces but not with exactly the same movement.
Lange only once used exactly the same movement in two different watches :
1815 Side Step Wempe, platinum, limited edition 50 p - Reference 222.049 - caliber L 941.1. - released 2003
1815 Platinum, Reference 206.025 - caliber L941.1. - released 1995
In my recollection these two are the only two Lange watches that have exactly the same caliber.