Differences between Harbeth, Spendor, Graham, etc. ?

This is perhaps a foolish question, given the subjective nature of this hobby, but is there any consensus regarding differences between the above brands? I’m interested in their "traditional" or "vintage" lines, not the more modern-voiced models.

For example, I’ve read that the Spendor Classic series speakers are, overall, warmer/darker than Harbeths and offer a bit more punch in the bass. If this is true, I would lean toward the former.