I think it is a matter of time and local market conditions. If most of the people within a specific region have DNP's and many of the people doing the hiring have DNP's, then they will probably prefer to hire DNP's.
But that's not the case at the moment. At the moment, the DNP is still new enough to be in the minority. In another 20 years, the situation may well be different if
more and more schools
switch away from offerering the advanced practice MSN's and replace those programs with DNP programs (as is now happening in many communities). If
that trend continues, the MSN's will find themselves in the minority -- and at that point, they may see more jobs going to the DNP's -- because that will be the new community standard.
So ... if I were late in my career, I wouldn't worry about it at the moment. But if I were young and anticipating 30-40 career years ahead of me, I would be planning to get the higher level of education.