We could analyze and speculate endlessly. But if you found something that works for you, that’s all that matters really. We could get into
the differences between a tube vs VCA vs optical comp, and the differences between optical implementations as far as tone goes. But who really cares? Suffice to say the Ampeg gives you the
response and
timbre you’re looking for plus that little something else that hits your personal sweet spot. And more importantly, it gets the job done.
You could go down the rabbit hole like some of us - or call it a day. If t’were me, I’d stop there. Because it sounds like you found your match. And that’s all that matters…unless you want an expensive new hobby.

I personally like the sound you can get with Ampeg’s Opto compressor. It leaves the low end pretty much alone. There is some very mild reining in of the highs. Not a lot. But it’s definitely there and (to my ears) rather tasteful sounding and musical. There’s a certain “bigness” it gives you along with the usual things any comp does. for you. The Opto comp is one box I could see as being a good candidate for the “always on” category. It’s definitely bass guitar oriented but also works well with some darker bluesy sounding guitar. Works well with fretless too. To paraphrase a quote from Ashleigh Brilliant: “It may not be totally perfect, but parts of it are excellent.
Lots to like. And for not a lot of money. Congrats Jim! You found you champion.