Is it not better to use "outline: 1px solid #000"? Borders take up space, but outlines do not. Even 1px extra space may be enough to cause unexpected line wrap

Is it not better to use "outline: 1px solid #000"? Borders take up space, but outlines do not. Even 1px extra space may be enough to cause unexpected line wraps and push items on to another row, for example.