Personally, I have to laugh whenever discussions like this occur. What really is a West German P228?
Is it a SIG that was actually made in West Germany? Then it is a P228 that was made before reunification, which was October 3, 1990 when West Germany ceased to exist.
Is it just a P228 with "W Germany" on the slide? Then that includes P228s made between 1991-1995 that were technically made in a reunified Germany, not West Germany.
What is a post 1995 German P228 CPO that had its slide replaced with one marked "W Germany"?
Your P228 doesn't qualify on either of these accounts since it only has "Germany" on the slide. However, you can take comfort knowing that it was made in the same plant and most likely on the same equipment as those "W Germany" P228s, however you want to define it. In my opinion, you have as much right to call your SIG a West German P228 as those with SIGs made between 1991 and 1995, even if it is missing a "W", since they were made in the the same place.
Do I prefer a "W Germany"
marked SIG to a "Germany" one? Sure, but I won't pay any more for one because there is no logical reason to.
I think that all P228s are of equal quality, but I personally prefer the German-made ones because think they
might be a little bit better.

There are many who do prefer the "W Germany" P228s so yes they are more desirable to some.