Dragonfly has already successfully tested "cross-chaining" between NEM and Mijin and claims the ability to do so with any blockchain (https://blog.nem.io/df-starts-crosschain/). I don't think Lisk or Ark have any technical advantage over NEM. From my research, NEM is still the most advanced platform out and once catapult is released, that advantage will continue to grow.
Another difference is NEM has ZERO inflation where both List and Ark are still creating new currency giving them 15% and 6% inflation currently.
Thanks for your reply. What is catapult exactly going to add to the NEM ecosystem?
A lot could be said about catapult but the short version is that it's a complete rewrite of the NEM architecture in C++. The use of sockets instead of HTTP for TCP communication (and other optimizations possible with C++ over Java) will greatly increase performance and allow transactions per second in the 4 digit range. It's also designed with flexibility in mind and will support plugins to make blockchain app development incredibly easy and efficient. There will also be security and stability improvements on top of the increased efficiency and scalability. I could go on and on but google will find much more detailed information about the project than I have time to share.
Thanks again for your answer. I'll definitely do more research about catapult.