The problem with Dash is those masternodes can be targeted by a powerful attacker and reveal your position. In general I don't like the anonymising system of Dash and would trust Monero a lot more if my life depended on moving money anonymously.
Thats the point.
Moneros anonymity and untracebility is mathematicaly proven.
This endless discussion XMR vs. DASH makes no sense at all, because from a scientific/technical POI Monero (or cryptonote coins in general) is the clear winner.
P.S. Because of the huge premine it is also very probable that a huge number of masternodes are controlled by a very small group of persons. So someone would just have to compromize this small circle to get the control over the network.
I don't even view it as a competition--more of a difference in opinion about how a cryptocurrency should be built. I researched a few privacy solutions (dash, drk then, was among them) before I came to the realization that monero was the best available.
My main criticism of dash was/is that the masternode system encourages centralization which weakens the prospect of good anonymity and fungibility. I kept reading from dash supporters that people were using best practices when setting-up masternodes and that they were spread over 30 countries--what I found was that 95% were based on the servers of a few companies spread over 5 countries which validated my initial and continuing concern if i were to entertain dash as privacy coin.
Dash supporters can squabble over how this effects the prospects of the coin's anonymity and fungibility (not odd that these two things go hand in hand), but what they can't do now is say that the coin is evenly spread over 30 plus countries or that masternode operators are following best practices.