What are your thoughts on the Wampler Ego vs the Diamond? I’ve always had more transparent comps (I have the Ego) but have wondered about the more “voiced” classics like the Diamond.
I like the Ego for use with different instruments, in different situation, because of that neutral tone. I set it so it is barely perceptible and it just fills out the tone, and smooths out the peaks. Most listeners wouldn't even recognize that it is there. It is easy to employ (like that!), and works perfectly, for me.
But the Diamond, as you say, has a little character, especially when you start using the tilting tone control. The optical compression is ultra smooth, and very much to my liking. Almost invisible, like the Ego, but great for fattening up the tone a little and getting an even sheen to my playing without screaming "Compression!" The tone control is a different element, really changing the frequency response in a musical way. It is like the voicing control on a lot of amps, changing the tone from bass heavy to bright and crisp with one knob.
I find the Diamond has a cool overall tone with the tilter engaged, but others might find it duplicative and unnecessary, maybe even getting in the way of their tonal balance. It is kind of an idiot-proof one-stop handle on tailoring the tone for different rooms/settings for me. And I like optical comps. That Smoothie is especially useful for me, a very handy set of controls in a small box.
Any of those comps work really well for me, but again, I set them so they are almost invisible as comps, and guys who like a little effect or squash might be able to answer you better!