What's the difference between augmented matrix with dotted line and solid line?

Question

The augmented matrix below has a solid line between the final column. $$ \left[\begin{array}{rrr|r} 1 & 2 & 4 & 8 \\ 16 & 32 & 64 & 128 \\ 256 & 512 & 1024 & 2048 \end{array}\right] $$ But I've also seen a dotted line used like this. Does a dotted line have a different meaning? $$ \left[ \begin{array}{ccc:c} 1 & 2 & 4 & 8 \\ 16 & 32 & 64 & 128 \\ 256 & 512 & 1024 & 2048 \\ \end{array} \right] $$

Answer 1

No; it's just a matter of style.