Stiffer springs remove tactility, so a clear spring (which is stiffer than a black one), and a brown stem would probably remove a lot of the tactility from the brown stem.
Edit: I lot of the reason people like Ergo Clears, is because they're more tactile than a brown stem. A brown/blue/red spring with a clear stem has very low force, and high tactility. Unfortunately the tactile bump on a clear stem is so high, that when coupled with a low force spring, they sometimes get stuck in the down position. Make sure if you're doing an ergo clear mod that the stem is properly lubed on the sliding posts, or that your springs aren't too worn. From the POS board I harvested clear stems from, I had fresh springs, but the old used stems weren't lubed at all. I had a few sticking switches, and had to apply translucent silicon grease to get them rebounding correctly. Because of that, the lubed switches ultimately felt smoother, so I had to redo my whole project, cleaning and relubing every clear stem.
Just something to consider if you want to do an ergo clear mod.
Edit again: There's also a "Panda Clear", clear stem with a black spring. This will probably fix any rebounding issues, remove some of the tactility, and increase the force of actuation.