Feature-wise, can anyone say something we don't have and nxt does? I know we have alias trading, voting system and asset/asset exchange which nxt does not have.
The Marketplace is the main thing you missed. Nxt has been in the doldrums recently, featurewise, because the implementation switched from storing everything in memory to storing it all on disk with a database, and that was such a big change everything else had to wait. That version (1.3.1) is now live, and we can expect a backlog of other features to come rapidly over the next few months.
Chances of a clone becoming bigger than qora is nearly inexistent, however it just came to my mind there's another coin which is much bigger than qora and, like qora, is based on java. In fact I think only these two coins are based in java if I'm not wrong. A clone would not be successful if they copy us, but this other coin can easily take all our features and kill qora since they have much bigger network effect.
I'm guessing you mean Nxt, and I don't think it works like that. Both being written in the same language doesn't make it trivial to port features from one currency to another. Qora and Nxt are completely different source.
Ideas might be reused, but that'll happen regardless. The reality is that Nxt has a long roadmap with lots of features planned, and the devs have too much on their plate already to spend time porting code from Qora. So I wouldn't worry about it, any more than Nxt worries about Qora taking the Marketplace.
