[Xymon] Advantages of Xymon vs Nagios?

I don't want to add noise to the list, but did want to thank all the folks that took the time to comment on the use of Xymon vs Nagios. To add some signal to this post, you can find the thread of responses in the list archive starting at:

 http://lists.xymon.com/archive/2015-February/thread.html#41023

Thanks everyone!

-Andrew

On Sun, 8 Feb 2015, Andrew Rakowski wrote (in small part): [...snip...]

So, what are reasons that folks like Xymon better than Nagios (besides all the helpful info from the great group of folks I've been reading during my years of lurking on the list...)?