The original 20k lokani colony was lost according to Reefarmers web site. The 30K was close to the 20k so it was used as a replacement.
I have had both of them in fact I still have the 20K and for me it is the slowest growing acro I have ever had. The 30 k was a pretty fast grower when I had it before.
The 20 k has more hints of light blue than the 30 k.
I do not have any pics sorry.