Be very carefull when buying these that you're getting the right size. The 4 string case is smaller overall. The 5 and 6 string cases have the same outer size, but the space for the bodies is different.
I almost ended up with the wrong size case for my new Euro 6 LX because when getting the Legend 6 ready to ship I got the cases confused at first. Because the Legend 6 has a one piece body it is about the same width as 4 string Spectors and will actually fit in the 4 string case. What I did not realize is the Euro and US bodies, because they are uniform wings (being about the same size for all neck throughs) glued on to the wider neck strip of my Euro 6, are much wider. My Euro 6 wouldn't fit in either the 4 or 5 string case.
I'm going to assume, from the looks of them in photos, that this is going to be the situation with all bolt on vs neck thru, 5 and 6 string Spectors.
Luckily I realized this before anything got shipped.
If you have any bolt-on NS style Spector, regardless of string count, get the 4 string case.
If it's a Neck-through Euro or USA NS style bass, you need the apropriate sized case for your string count.