nxt is adding new features that will make the transaction sizes excessive. while i was generous to leave transactions per second at 3.4. the base transaction size is 160 bytes, but there are transaction types that can be as large as 10KiB, limiting the block to only 3 of these transaction - thats 0.05 tps. the largest transaction size for bitshares is 340 bytes.
both from a design and technical standpoint bitshares is more scalable than nxt. while you can say that nxt is more decentralized, bitshares is more secure.
if the comparison chart assumes anything at all it assumes the worst possible scenario for bitshares and the best possible scenario for competitors. everything in the bitshares column aside from market pegged assets has been tested on public test network.
What if several delegates collude or are coerced? Especially if these several delegates each controls more than 1 node. That makes them a central point of failure. You can't fire old delegates and hire new ones dynamically, it takes time. If they collude or are coerced and do harm to the network, it will take time to recover from the damage. NXT doesn't have this limitation per design, hence NXT is more secure.
tx size and the 3.4 limit is temporary. Until TF is implemented, NXT is still in the bootstrapping phase. Until TF is implemented NXT is not what it's designed to eventually be. When TF is implemented, NXT will be more scalable.
can you create a plausible scenario for collusion? there is simply no incentive to collude. because this is designed around free market incentives collusion is not economically viable. there is an economic cost to collusion which in a free market economy with out the intervention of government makes it unfavorable for all individuals.
who's argument is reliant upon conjecture now? nxt is going to impliment this they are going to implement that. bitshares has already implemented a dividends system, it has already implemented all the features of nxt and is thus far substantially more scalable. bitshares has been in alpha testing for the past month and a half and has had 8 iterations of public test networks. the speed of development for Invictus Innovation and bitshares team is far greater than the speed of development for nxt