Interestingly, this is why I'd prefer the OG over the SE; I think the original Solaris has a pleasantly aggressive tone. I'm sensitive to harsh peaks in the higher registers, but I didn't find anything that remotely offends me in the Solaris' treble presentation.Well, the OG is more aggressive. I wouldn’t necessarily equate aggressive to better or more refined, there are plenty of instances of overly aggressive IEMs that become unpleasant (in my opinion the OG is an example). But I’m sure there are some who prefer the rougher tuning and harder transients of the OG to the SE - Crinacle is one.
In any case, I wish I could find some time (read: stop being lazy) to try the SE for myself.