Your Cadenza Bronze is one of those cartridges which works extremely well with either an active MC gain stage or a SUT (I’ve tried both with this cart). You can really go either way depending on preference. If you’re looking for a huge change or improvement, then I’d say no, it’s not a cartridge that benefits as much from a SUT as some of the much lower output models (as noted by @mattmiller ) - unless you don’t love the sound of your existing MC stage. But MC stages themselves can vary a lot - for example the JFET MC stages in ARC Reference 3SE and Herron VTPH-2A fall sonically on the "lean & clean" / neutral side, whereas Hagerman’s Piccolo and Sonic Frontiers Phono 1 sound warmer / sweeter.
Many of us choose SUTs because of the more warm, weighty full-bodied sound and sweeter midrange many good SUTs render (but not all - for example, Lundahl LL1931 is not warm). However, the Cadenza Bronze in particular already carries *some* of these qualities by virtue of its warmer voicing in its line, probably due to the tapered aluminum cantilever. If you still want more of this, a SUT would be a good choice. May be hard to say until you try it :)
It you try a SUT then ~ 15x is ideal for that cart, but anything in the range of 10x to 20 will work great. Any CineMag SUT with the blue labels (Sky, 1254, 1131) is a pretty good quintessential SUT sound to try. Not a fan of the red-label 3440 - I don’t think this one is very good. Modwright is working on a new SUT box too, I believe with a custom CineMag blue.
If you moved to a Windfeld Ti with 0.2mV output, I'd say a good SUT helps a LOT there, to keep noise floor down and to inject some much needed warmth & body to that cart's sound.