ΔE 26.7, loose: different enough that you should pick on purpose. Light Green (Blue Shade) is noticeably lighter, much more saturated than Mortarion Green Clear.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 27). Light Green (Blue Shade) is noticeably lighter, much more saturated than Mortarion Green Clear.
The same difference applies the other way round: Mortarion Green Clear is noticeably darker, much more muted.
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 Mortarion Green Clear on the colour wheel See Light Green (Blue Shade) on the colour wheel
All matches: Mortarion Green Clear equivalents · Light Green (Blue Shade) equivalents