Thought I would sum up and "de-confuse" people on what I have determined about Trillium
Trailers was founded originally in Ontario. Trillium is the name of the official flower for the province of Ontario--and the logo resembles the flower (Crown-owned businesses in Ontario often use a similar logo though they don't call their businesses Trillium).
Trillium eventually went bankrupt during the economic downturn of the late 1970s and early 1980s. For some time no Trilliums were made at all, but someone acquired the molds and other businesses continued to support and repair and restore the units.
Some time later (1990s some time) A company in Alberta called "Ramblin Industries" used the original molds to create a few new Trilliums. By the turn of this century they went bankrupt however.
Joe Thoen owns a business in Calgary, Alberta that has long specialised in repairing and restoring fibreglass RVs and was basically the "go-to guy" for getting your Trillium fixed in the region. He acquired the molds and picked up where Ramblin left off, making the Trillium Outback starting in around 2002. They still make them in Calgary today (I have one on order in the process of being made).
Three or 4 years later (2005 or 2006) Tom Young, the former VP of operations for the very first Trillium company in Ontario, who by then lived in California, decided to revive the Trillium brand in the US. Calfornia is very hostile to new business startups if they are pretty much anything but internet startups--the expense and environmental regulations involved in setting up a fibreglass shop there prevented him from making them there. Plus Tom did not have one of the original molds yet. So, Tom had Joe make the trailers in Calgary to a partially complete state, and the interiors, trim, windows
, etc. would be completed in California, so for awhile Trillium==Outback for the most part (kind of like how Ford makes the Transit delivery van in Turkey then re-does the interior in the US to avoid the ridiculous "chicken tax" tariff in the US).
Eventually Tom bought a mold or two (from Joe I think) so they played nice for awhile at least but parted ways for some reason. Still, Tom could not get a factory set up cost effectively in California, so he tried to set up in Nevada but that didn't last either. So, to make use of his mold(s) he had the Escape
guys use that mold to do what Joe/Outback were doing before. Now Tom of TrilliumRV seems to finally have his own digs in Arizona where he can use his mold(s) to make the Trillium all by himself.
In the meantime Joe of "Outback Custom Liteweights" in Calgary still does a thriving business serving the Canadian market (there is only one dealer of the "other Trillium" in Canada--in BC--that moves less units than Outbacks sell here). The Calgary operation mostly makes new Trilliums from scratch but they also still restoring old egg trailers of all makes. They also have another business that repairs RVs in general.
So which ones are "real Trilliums"? I'd say they ALL are! They are all made with the same mold and use the same general design--they do have a lot of interchangeable parts, etc. and the owners of both operations have past connections with the original company. Tom may have been a VP with the original company, and own the Trillium trademark (in the US only as far as I can tell though), but Outback is made in the same country as the original Trillium and that company started a few years before the US company. So, maybe Tom can legitimately claim to be the "direct descendant of the original company", given that Outback started making them first and even helped the US company make theirs they are also a direct descendant--maybe "squabbling siblings"
I joke about the squabbling part--I haven't seen any evidence they have or had squabbled beyond some saying there may have been a trademark dispute in court at one point. Anyways maybe others can help out more. I know that both comapnies have representatives on this forum so I hope they can correct any mistakes if they see this. For my part I think they both sell quality products, but since Outback is local to me (as I am from Calgary) and proved very friendly to deal with I went with them.