I don't have enough SA caps on hand for a full keyboard, so I can't really attest to the feel, but I've already swapped out my arrow cluster, and it significantly changes the sound in a way I can't really explain. I sounds less crisp, but in a good way. It almost sounds like a sword being unsheated in a very short amount of time. It has almost a bit of "swish" to it, without losing the "click" entire.
I feel like this doesn't sound like an endorsement, but I wholeheartedly like the sound of the SA profile caps over that of the OEM caps.