on poloniex, NXT is lower than BURST on volume, that (my interpretation) indicates speculation in burst, likely pump&dump, and until our volume reaches a somewhat more normal level, we are probably overbought at too high a price.
not that i am complaining, i still got the keys for 7mln burst and change.
Either that, or burst is in fact becoming more widespread and more secure than NXT. that would be kind of interesting as we've got a pretty nice appreciation ahead of us to reach a similar valuation as NXT. They've got more developers and infrastructure, but who knows, perhaps BURST has the superior architecture and security. Lots of people are unsure about proof of stake - we are much more comparable to proof of work, only we are environment friendly and compared to even bitcoin, much more decentralized.