I think the one on the left is a 'Hawaiian' that hasn't quite "matured" yet (I figure only time will tell if it's not) and the one on the right is just a plain 'ol all-green variety.
My 'Bonnie' baby. What I find interesting about this little fella is that I removed him from a 'Green Bonnie' which sports no variegation.
Chlorophytum laxum 'Bichetii' (On the left, at purchase. On the right, taken just the other day (I bought this one as a clearance plant)).
Planto