All I can say is I like both ... a lot, but did not have the opportunity to compare them (at the same time).
Before the new horn in the Klipsch premier series, it would not have been a contest.
I happily use RF-82ii for my HT and they are definitely not as good as the RP series. Klipsch seems to change models fairly frequently, and often the changes are small and incremental. However, the premier is a clear improvement!
I believe, as JBL has learned to clean up horn artifacts, Klipsch has developed a parallel technology. It is not completely gone, but is at a level where the pros and cons are starting to get pro heavy!
But the SVS and Klipsch do not sound the same and your best option would be to listen to both.
Ideally, get them both in your home at the same time and you will know which one you want after a few days!