Bitshares is decentralized where as normal exchanges are centralized, you don't know if the centralized exchanges are operating a fractional reserve or if they might exit scam or get hacked, with BTS this is far less likely as every user is entirely in control of their assets (bar EBA which are somewhat centralized).

Off the top of my head, cryptos which offer token creation are ethereum, waves, ardor, antshares, but at this time I believe BTS is superior.