They were made with the same intention: To give those people who completed the most difficult content currently ingame an extreme challenge that wasnt intended to be cleared or even attempted by the majority of the people. It was an extra, ultimate challenge for the raiding community - very much how Ultimates are now.
Again, what 2nd coil savage was was pretty much the original version of the fights we already had before, prior to the various mechanics being nerfed. It was not a step beyond in difficulty in that regard, which is what ultimate is.

And just a sidenote... judging by your lodestone-profile you havent done or at least completed the Ultimate fights yourself (nor the Omega Savage ones) - if you want to base someones judgement on the difficulty of those fights on wether or not they did them, may I sugget you refrain from making such judgement calls yourself?
I've seen ultimate. If you think 2nd coil savage compares in any way, you clearly haven't at least done the same. If you think I need to have completed the fights myself first to be able to know that, then, well, you're wrong on that too.


And for them Savage presented the same amount of challenge as Ultimates present to the dedicated raiding community today.
It's really not even close.