I occasionally chat with the owner/circuit designer at La Figaro and can provide some information regarding recent comments...
Any oddities you find in packaging are likely due to customs opening/inspecting the package and/or mishandling during shipment. La Figaro packs them a certain way and then they are sent to a 3rd party logistics company that is responsible for importing internationally. I'm pretty certain the massdrop orders are brokered by shenzhen audio so those might get handled differently.
I don't know that the website referring to variants of the amp as "bright" vs "warm" is accurate. I don't know anyone that has heard the so called "bright" version (6J4P, 6SJ7, 5693, 6Ж4С) and referred to it as bright. If you ask the circuit designer, he thinks the 6C5, 6J5, 6J5G, 6J5GT, L63 version is better and that's his preference. From what I gather, that version is more expensive to build (electrically and probably supplying tubes) so maybe it's easier to ship the 6J4P version internationally. The 6C5, 6J5, 6J5G, 6J5GT, L63 version is basically the 6SN7 version of the amp (a well regarded tube that people are familiar with in tube audio). A 6C5/6J5 is one half of a 6SN7. Since this is a dual mono design, it uses two 6C5/6J5 (so while that tube may seem obscure, it's really not).
This amp has been in production for a long time (even dating back to the DV337 which was designed by the same person who did the 339). The designer very much has a continuous improvement approach and not a one-off, flavor of the month approach. The differences between the versions are minor so I wouldn't fret too much about it. However, the most recent iteration is not shown on their website, but I'll attach a picture below. The difference being the vishay film capacitors (two green capacitors). You should be able to tell if your model has them without removing the bottom panel.
