The primary difference between Royale Lustre and Royale Luxury Emulsion/Apcolite Emulsion is that Royale Lustre helps in the development of Daana Pattern. This is basically due to the difference in viscosity of the product compared to other emulsions and Lustre finish always has a slightly higher sheen level than any other emulsion. Lustre finish can also be used as a flat finish without Daana Pattern, where it will look and perform like Royale Emulsion but with slightly higher sheen. Royale Lustre would primarily be used for bringing out the Daana Pattern on the walls which is not possible with a regular Emulsion. Also the surface preparation for Royale Lustre for Daana Pattern is different where Primer + Putty + Asthar (1 part enamel and 1 part solvent primer) is used for base preperation and then the top coat of Royale Lustre is applied without dilution with a long nap roller to bring out the Daana Pattern. In case you would want to compare different emulsions, please use the comparison application on our website: www.asianpaints.com.