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Kailh Pro Purples were known as being extremely scratchy, even back in the day. They were switches that required a lot of work.
With 3204 or something, and 63.5 G Spirit springs, they turned into light, top-mounted Browns. Very nice, and more consistent than the stock switches.
But yeah, they were very problematic in stock form. They were one of the first custom switches in the 'Ergo Clear' category, though. They were about MX Clear bump and Ergo Clear weight [65 - 70 G], but in a top-bump profile that was somewhat novel for the time.
The AKKO Creamy Purple Pro are extraordinary. I wouldn't call them Ergo Clears, but they are in a light or medium-tactile category. They have a distinct and classical-feeling tactile event. In general, they have good-enough factory lube, and can give a poppy sound.
There is a defect rate in batches, maybe not the most recent variant. But 1-25% of switches could feel unlike the rest. So you have to handpick. But that's all you have to do. You don't have to do any work on them otherwise. I have a Neo80 full of them, and I can't bear to change anything about it. They definitely emphasize the tactile event over having a heavy spring weight, which is something I usually prefer.