This one is larger NS, darker than and not so green like the other I have. I think because it is a rothschildianum x kolopakingii (1st picture) not the roth x kolo var. topperii (2nd picture).
Very nice, I koklopakingii hybrids for darker colors, I like Kolo var topperi when bred to yellows or other lighter colored flowers. I have a Jurgen Roth (kolopakingii var topperi x primulinum) that really looks like an alba until you see the rich honey brown stripes in the dorsal. The topperi makes a big difference in color.
Leo