I.D L180 - L181?

Hi,
I hope this works as it's my first post.
Can anyone help with an i.d, I have 2 of these sold as L180's but have been told they could be L181's?

Very nice looking!! sry I can't tell you which one it is.

Thank you. I love them. By the looks of it we have 1 male and 1 female, but they are too small to tell. The photos from my phone really don't do them any justice, but they are very camera shy, it's near impossible to get a good head on shot.
I really don't mind what they turn out to be, I would just like to know so I can look after them as best as I can. They don't seemed too fussed on algae wafers or cucumber, will try courgette (zucchini) next.