I recently had a thorough setup done by a luthier on my bass. new bridge, new sound post, fingerboard planed, a real overhaul, so I decided to start again with a new set of strings.
After spending almost 2 years with Evah regulars, and a few months Evah weichs, I resorted back to playing my dead spiro mittel set with 4 year old Oliv G in recent months.
I wanted to start over sound wise,So I put on a fresh set of s42 mittels as to start from zero again and learn the subleties of my new setup and go from there.
Even though I promised myself to just stay with the mittels for as long as possible, I just couldn't adjust to liking the thin feeling (and sounding on my instrument) mittel G.
Two weeks in, I put on a new Oliv G, after hearing myself on a recording and ,oh man, it was like coming home! There was that fat G string sound again! Great fundamental, deep sound over the entire range of the string, nice initial attack when walking, I can also feel the difference in how it makes the bass vibrate. There is a tension and diameter difference, but it actually feels nice to have a top string with some girth.
The only minus for me is the tuning stability, even after it has settled down and is fairly stable, with a gut string, in the back of my mind I'm always thinking about the tuning of the G string when performing on stage, whereas with an Evah string or spiro string, tuning stability is something you take for granted.