ΔE 19.7, loose: different enough that you should pick on purpose. Bright Green is noticeably darker, more muted than Lime Green.
Not as a straight swap; see the closer alternatives below. Loose match (ΔE 20). Bright Green is noticeably darker, more muted than Lime Green.
The same difference applies the other way round: Lime Green is noticeably lighter, more saturated.
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 Lime Green on the colour wheel See Bright Green on the colour wheel
All matches: Lime Green equivalents · Bright Green equivalents