Welcome!
Your first exhaust there is a catback, meaning it replaces all the pipe after the secondary catalytic converter, hence the multiple pieces and the name. It is however, your typical eBay no brand exhaust, which ive heard can have fittment issues as well as welds break on them. Can really be hit or miss.
Your second one is an axle-back exhaust which simply replaces the muffler and the short section of pipe just before it. OBX is a reputable company so it should be good quality and be well put together.
As far as sound goes, the axle-back will provide less volume but should give a good growl to it at WOT. The catback should offer more overall volume but shouldnt have any rasp, considering you have stock exhaust otherwise.