HAHA !!!
During my "attic evacuation" I just found back my micro-switch Suzo joystick:

(Sorry no time to clean it).
I think it's safe enough to say that the one's with the black handle and two buttons are the extremely rare all-leaf one's and the one's with the red handles are the one's with micro-switches for the handle and leafs for the buttons.
Now, as you may remember I was a bit surprised about Etienne's version of it. Something in my mind said that that was not what I remembered from a Suzo Microswitch joystick. In all honesty, it looked.....mmmm, not the Suzo quality I was used to. So I even suspected it of being a bootleg....
Now, I saw one like Etienne's at the retro computer fair last sunday, and noticed that there are three small screws on the bottom. That's different because both versions I have have four larger screws:

(if you watch closely, you can find out where I spend the first 20 years of my life !!!

. This is funny, I am 100% positive that this is the underside of my all-leaf stick. I transplanted it because of the missing rubber foot).
So, I of course had to open it up to see if I was getting really old already, or that my memory was still fine:

YES ! THAT is the micro-switch Suzo I've always remembered. Like a proper arcade stick. Look at those micro-switches, SWISS MADE ! Nothing but quality here. And of course still the leaf buttons exactly like the one's on the all-leaf version.
I'm pretty sure that these two versions were produced in Rotterdam.
And then.....I guess that then happened to what seems to happen with all great products. They follow the path that leads to darkness !
Very likely some f-ing management dodo figured out they could:
a) earn more money or
b) lower the selling price to "beat" the competition
by reducing the quality and coming up with the PCB version, with the el-cheapo (looking) micro-switches and "fake" leafs).
I'm also pretty sure they moved production to the far-east by then...
ORRRRRRRR......it's not a real Suzo. I still leave this option open...we all know how it works in China.... but the S.T.C. Rotterdam is pretty much a watermark, it is also used on the professional joysticks....
I'm not saying it's necessarily a bad stick, but I do have the feeling (and it actually also feels like) the least of the series....
So, apart from this two button version, there is of course also the single button version. AFAIK this has the same set-up as the red-top micro-switch version. They do differ in button set-up though. Some have leafs, some micro-switches.
Ahhhhhhh, now I can rest
(Etienne, you MUST try the one's I have when you drop off the samples

)