I would probably lean towards the camp of @BassmanPaul
I used to have a Coliseum bass with the matching 118 cabs (I still have one of the cabs in my basement since they are so awkwardly large, the buyer still hasn't picked up his second cab from last October). The stack was incredible to look at, but, honestly, any of my other cabs were more enjoyable to play with the head. The 18s definitely have a distinctly darker tone that you can't EQ out. In addition, they are really awkwardly large/heavy cabs with only a handle on the top.
That said, if you are looking for that tubby/muddy kind of tone, they'll deliver in that area. And they are cool to look at.
Edit: Pictures or it didn't happen
View attachment 1135615
Those cabs may be big, awkward, and heavy, but boy do they look good being it