I need a new chain soon and have to decide which one to pick. I am currently using the KMC z410 which came with my bike. 1 month of use with no problems but I need to change the rear cog which will probably require me to lengthen the chain a bit. I want to go with the KMC z510hx but it has mushroom shaped rivets and this being my first chain fitting myself, I'm a bit wary of the mushroom shapes. Anyway, should I go with the 510 or the 410? Does the mushroom shape change the way I should install the chain in any way?

Sorry, these are probably nooby questions but I couldn't find any helpful info anywhere