I too get very confused with Dracaenas (just like with a lot of other plants, LOL.)
Here it's listed as Dracaena fragrans 'Lemon Lime':
While this lists it as Dracaena deremensis 'Lemon Lime':
http://www.plantoftheweek.org/...
This place lists it as Dracaena deremensis cv. 'Warnecki' and then says 'Lemon Lime' is a Warneckii cultivar:
http://plantcareguru.com/plant...
... I think I will just call them Dracaena!