Apart from the compilation example, you see it sometimes when two engineers in the same studio work on the same project, or when a newer engineer is gaining experience under the supervision of senior engineer. You also sometimes see it when a single song that quite different from the rest of the album, or a remix comes from a different source and you are asked to include it as-is. It's not the normal situation, but it is not unheard of.
However, having two very different engineers do the same project and taking a mix-n-match approach between them is quite uncommon. I haven't noticed such a trend.