How does the DASH governance system compare to other top 10 cryptos out there? ...Erm... What governance systems...

It's more meaningful (apples to apples) to compare DASH with the other coins that feature explicitly blockchainy "governance systems."
Decred is superior to Dash in every conceivable way.
Peercoin has been around longer and has a better benevolent dictator for life.
Synereo if nothing else wasn't unfairly instamined.
Monero's governance is working very well, giving us state of the art fungibility with RingCT, a slick GUI, and i2p routing (soon).
On the other hand, Dash's governance is causing severe tension in their community.
https://www.dash.org/forum/threads/dash-core-team-accountability-and-lack-of-communication.12567/Here's what someone who tried Dash thinks about its overhyped "governance systems."
https://www.dash.org/forum/threads/i-sold-all-my-dash-here-is-why-and-my-view-on-the-state-of-dash.11416features of Dash have issues:
1) Governance - This was an important idea and could have been very interesting. However, this governance model is unproven and thus far the results are lacking. It has been little more a grants system. The few large projects done with it have all been failures (PR, website design, ATM integration). More importantly, it does really reflect the community (look at the vote coints in the Shadowcash thread compared to the development direction of Dash).
In reality, it may even be creating negative value for the community. The reason is because it makes people not perform tasks that they would have done for free under different circumstances, but with the governance system they are unwilling to do it unless they are funded and paid. When there is no grants system people volunteer. When there is a grants system no one wants to work unless they are getting a grant. Volunteering while others get paid just feels wrong, psychologically.
As a result of this effect, the malinvestments of existing grants, and the lack of real control of development or direction despite the governance model, I would say thus far the governance system benefits are dubious.
You don't see those kinds of threads in other communities except the ones controlled 100% by individuals (Vcash, ShadowCash, jl777 trash)