ΔE 15.4, loose: different enough that you should pick on purpose. Cryx Bane Base is noticeably darker, warmer than Mid Feldgrau.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 15). Cryx Bane Base is noticeably darker, warmer than Mid Feldgrau.
The same difference applies the other way round: Mid Feldgrau is noticeably lighter, cooler.
ΔE is the colour difference between our two swatch estimates: under about 6 is close, over about 15 is loose. Real paints also differ in finish, coverage and how they thin, so test before you commit.
See Mid Feldgrau on the colour wheel See Cryx Bane Base on the colour wheel
All matches: Mid Feldgrau equivalents · Cryx Bane Base equivalents