I bought Black Coral last week, and it looks like your plant on the right. The name on my pot says Sansevieria Black Coral. The store had a second sans and the variety name started with Z. I didn't buy it, so I can't recall the name, sorry. :-/

I'll paste the link to the thread with my picture of Black Coral. Scroll down, it's not a great picture.

Lennie

Here is a link that might be useful: Black Coral and Jade Dwarf Marginata

Enterotoxigenic,
Welcome and those are some wonderful grown plants. Their names are; Sansevieria trifasciata and Sansevieria trifasciata 'Black Coral. Some times some nurseries uses ZELYANICA. It is disputed and may be to another group. Unknown why. Maybe some one here may add to this.
Stush

Found on web.
"Most plants sold as Sansevieria zeylanica are S. trifasciata".
From; http://mrec.ifas.ufl.edu/foliage/folnotes/sansevie.htm

Stush2049
Thanks for the reading material.
After reading the article, does this mean that the lighter one will darken after time?

Learn something new everyday...even when I don't want to.

Well ET, mine sure did. Some are almost green/black. The new growth is normal and looks great together. Mine are very old.
Stush

Stush, start from a leaf a hybrid and it will revert to the mother plant, then you will know what it is from. You may be surprised what comes up. They need warmth to start, however I do mine in July -Sept. Give it a try you have nothing to lose but may gain a new species. Norma

Hello Norma.
I did just that many times when a heavy varigated yellow edged leaf broke off. All I ever got was trifasciata plants which I had to find homes for. Was over come with plants. You can buy nicer bigger plants in the big box stores than it would cost to sent to people.
Stush