The Cathedral doesn’t have a setting where it pitch-shifts the original sound an octave up before reverb or delay, like the Verbzilla Octo mode. If you have a pedal capable of doing a octave-up shift, whether a HOG, any of the POGs, or even something from another manufacturer, you can put it in before reverb or delay to get that shimmer sound. Since you’re considering buying both pedals, you might consider buying a different type of pedal and therefore expanding the range of your pedals.

I own both the Cathedral and the Verbzilla, and am in the process of seeing if I want to get rid of the VZ and just use the Cathedral in combination with other pedals for this.

Here’s a thread containing discussion of getting that shimmer sound.

https://www.ehx.com/forums/viewthread/2328/

And, not to be heretical in my first post on the EHX forums, but the Effectology demos are great places to mine for ideas and set-ups, even if one uses non-EHX gear. EHX does make a lot of gear that is unique, though; I’m very happy exploring all that my HOG (with foot controller and expression pedal) is capable of….