Monero has proof that the ring signatures are impossible to double-spend, are exculpable (ie. funds cannot be stolen by other members of a particular ring, including the "real" signatory), are unforgeable (cannot be faked), and are anonymous. Since you've made the accusation I won't take on the role of the common Darkcoin cultist and say "put up or shut up!", I'll instead show you what burden of proof means (and this is literally taken straight from the whitepaper) -
Proof of double-spend protection:
Proof of exculpability:
Proof of unforgeability:
Proof of anonymity:
The burden of proof is on Monero, and there is the proof. Now do the same for Darkcoin, please.