I have not seen the flowers to verify, but purchased some papuanum seedlings from Ten Shin. They have very faint leaf pattern (more like wentworthianum than papuanum). But as they are getting bigger, the patterning is getting more obvious. So far the patterning is about as distinct as my mastersianum, but the plant habit and leaf shape is much different than mastersianum.
Mine has been a reliable bloomer for three years. Got it as a seedling from a local grower. I have tried various plants over the past decade and this one seems way more vigorous, and is multi growth. Great picture and growing.