I started this thread asking questions about distinguishing the different Cave box styles. Now I have the answers, I thought I'd post all the info together [Under Construction].
There are three distinct boxes for Cave kits, commonly referred to as 'Old Style', 'New Style', and 'Annex'.
Here's the pics, so you can tell the difference:
Old Style

New Style
Annex

Next I'll add a list of all the Cave kits and what box they come with.
Thanks DaveK, Skykid, Mr. Ord and andy251203
Here's the original first post from this thread:
spadgy wrote:Could anybody post a picture of an old and new style Cave PCB box side by side so I can finally settle the difference in my head?
Thanks!