Here's the main thing I worry about- DRK is much further along in implementing decentralized anonymity than VRC is. Once they have it working, implementing "Darkbit" to imitate Veribit is a trivial thing for them to do. Could happen extremely quickly.
Whereas VRC will still be looking at a long, hard road to decentralized anonymity. DRK is doing they harder thing first, VRC is doing a lot of fast easy things first. The other problem is that DRK is much higher profile than VRC.
I like VRC, I like the team. I'm glad they're open with their identities, and they seem able to handle things, if still a little rough around the edges.
But there's nothing certain here, and if they don't keep delivering, and delivering fast, and delivering on bigger things, another coin could still easily dominate this market.
There's big risks here, still.
Here's the thing that nobody is considering. Crypto will eventually be regulated by the government. California has enacted legislation that makes crypto legal. Canada is already starting to regulate companies that deal in crypto. Western Union recently stated that they will accept digital currency when (not if) it is regulated. As soon as crypto is regulated, anon will not be allowed. As a matter of fact, if crypto is ever classified as money instead of property, most systems of anon will become money laundering and become a Federal crime.
Anon is simply a short lived fad. Coins like VeriCoin can simply remove the option, but coins who have anon coded into the blockchain will require a hard fork.
I wouldn't be surprised if this happens before coins like DRK get their anon issues ironed out.
This is my personal opinion. I am not speaking for the VeriCoin team.