NuBits have demonstrated better stability and are simpler to use than BitUSD. Those factors translates to NBT being traded at much higher volumes than BitUSD - we saw in November and December that daily transaction volumes for NuBits regularly eclipsed $1,000,000 while BitUSD trading was several orders of magnitude less. Even now - with our previous top three volume exchanges having been hacked - we have higher daily trading volume than BitUSD.
In terms of stability, NBT have been as close to $1.00 US as possible while using NBT/BTC trading pairs over the past six months. The Nu design has maintained a robust peg even in crisis scenarios like the one we faced at the end of February.
In terms of simplicity, I would recommend trying out both the NuBits wallet and the BitShares wallet to judge for yourself. We would be happy to send you a few NBT to play with. I think you’ll quickly see the difference in quality and ease of use. That ease of use would translate to higher trading volumes on your exchange.
That covers the “Pros”. For “Cons”, our community is smaller than BitShares right now, so it has to be more strategic in its actions. As well, the BitShares community was quite vocal initially that our design did not allow permanent supply reductions of NBT, but our recent NSR-for-NBT burning and variable transaction fee proposals solved that problem. Our parking rate mechanism also allows temporary reductions in supply.