The samples arrived, together with original OUTEMU-snap-spring switches (See this thread @wjrii mentioned).
These are my first impressions:
Cream Clickies:
I really don’t like this switch. Maybe I got a bad sample, but there are two things I find displeasing.
The strong stick-slip effect, and the inconsistent click sound. Sometimes it simply doesn’t click, but when it does, the click itself is quite pleasing.
Zeal Clicky:
Strong, defined sound, nice tactility. Almost impossible not to bottom out after the click, but that suits me.
I really like it, and will probably build a board with it some time.
TTC Golden Blue:
I was curious how a “half-silenced” click-jacket sounds. It sounds nice, at least in my ears.
The unavoidable jacket-rattle is of course audible when pressing the switch right besides your ear, but nobody types like that 
Relatively high pitched sound, as expected.
Weird little oddball, might build a board with it.
GTMX and OUTEMU snap spring blue:
Both share the same click mechanism, but as @rpiguy9907 stated in the aforementioned thread, the original Outemu switches are clearly superior. We should have more switches with the snap-spring mechanism. The sound is different to all the other mechanisms. If I had to describe it, I’d say it reminds me of a click jacket without the rattle, more defined and not as loud.
I’m already in the process of building a board with them. My favourite out of those five.