Probably as disparingly as the respective abilities of those ships for jumping to other systems, having full directional control in navigation within system, undertaking exploration gameplay, refueling and repairing gameplay, customizing crafted modules, fully working control and management systems, reasonably working silent running and detailed countermeasure systems, ability to participate in persistent faction warfare, salvaging or smuggling gameplay or more generally decent physics or just behaving in a stable manner without crashing, glitching or breaking basic geometries in the game every other minute. Just to name a few more differences.
So yeah, I guess you are right, the fact CIG has got a more than obvious inspiration in the design of these ships does not necessarily mean they are exactly the same.
Seriously though, I think this is fine and probably just a harmless nod and token of appreciation from from CR to Elite, "imitation is the sincerest form of flattery" and all that. These ships are also a great way for CIG to try and attract some ED players that may not have yet tried SC via a glimpse at how those ships (probably among the most popular in ED) may look in the inside one day (scale differences notwithstanding).
