Thanks all! Sounds like I shouldn’t be concerned about performance - if it can shift well for Campy, I don’t really see a reason why it wouldn’t shift well for Shimano.
As for nickel plating - is that for the bling factor, or is there a good performance or durability reason to have it? I gotta be honest, the reason I know I’m not using my 34T and 30T cogs is because they’re a lot shinier than the other ones - which means I definitely don’t scrub down my nickel plated cogs as is. Now, if nickel plating makes the cogs harder/more durable or less prone to rust/corrosion, that would be something else…