Ring signatures are better than master nodes. It is better to look under the hood and try to understand how it works. I am not a technical person but a quick google search and 2 to 3 hours of reading all the articles and comments from each side it would be easy to see which is better. The answer is right there in front of you. I also did not know that research and implementations of ring signatures started on 2001. It was wise for the Monero development team to use it in their cryptocoin to find answers in unanswered questions since 2001.
How I personally view it, is that buying Dash is sort of like buying a timeshare for some condo some where. It is viewed as an "investment" that you might only use a couple of times, and whenever you are done buying whatever you need with Dash (I guess a soda?) then you sell your masternode/timeshare to the next person who is hoping the same thing happens.
Now I know you could argue that every crypto is the same way (buying and hoping to sell at higher prices), but it's the distinction of owning a "masternode" that controls inputs and outputs is what really turns me off from the whole Dash thing. Having one node that is better than the other one is just really... sleazy? (for lack of a better word)
An emerging problem with Masternodes is they are subject to law enforcement actions due to their for-profit money laundering scheme.
The Apple banhammer is just an indication of the start of Dash's problems with LEA. The crackdown has begun.
Roger Ver: "The discontinuation of Shared Send at Blockchain.info was due to threats of violence made by strangers in government."