Second one works much better bu does not seem to do any better job than the 2voices.
There are two types of octavers. One replaces the octaves with synth tones and you could hear the tracking (GxOC2).
Second type works well for any frequency and even vibratos sound natural (2voices, Gxdetune?)
I tried for both and it worked! Make sure that when you go into /mod-2voices.lv2/ that you use a capital V when editing the file 2Voices.ttl! I used the lowercase and it wouldn’t even bring up the file. ALSO, for some reason I cannot see the changes in either plugin unless I use a chrome incognito tab, even after trying to clear all the site settings. And even though I can’t see the changes in the knobs in a regular browser tab, I CAN manually changes the values lower than -12.
Edit: As Jesse stated, clearing the browser cache will make the changes visible. I incorrectly assumed that clearing the site data in Chrome would do the same! WRONG!
I am using the dwarf for 1 year or more on the sax (mainly tenor) too but i have many issues on stage and envisage to return to my previous effect chain. CPU usage is one of the biggest problem mainly with octavers filters and harmonizer. Sound quality and dynamics are often poor. The concept is realky great but the implementation a bit disppointing, tricky, not clean. The bug that requires to use a knob to change the pedalboard is also a big issue (you are constantly bend to switch the set up on stage it s ridiculous). It s also a bit a geek thing and you spend hours to find basic things like autowah that are verypoor compare to an electro harmonix one. The only effect really killing is the shimmer reverb. Happy to share experience.