There is no difference. See
M&M minimum miles on *A carriers, effective August 1, 2004.
LH
European transborder flights:
- C, D, Z: 2000 miles
- B, Y: 1250 miles
- M, H, Q, V, W, S, G, K: 750 miles
- L, T: 125 miles
OS
European transborder flights:
- C, D, J, Z: 2000 miles
- B, Y: 1250 miles
- E, G, H, K, M, Q, S, V, W: 750 miles
- L, T: 125 miles
Your LH list is for European domestic flights while your OS list is for European transborder flights. This explains the difference.