[i.h]

EE closed down the Wanadoo/Orange LLU setup years ago; way before the BT takeover. Since then they've just been selling BT Wholesale service, like Plusnet. 

Since the merger EE quickly moved to using the same in-home hardware as BT and Plusnet too. I believe they even share quite a lot of support functions nowadays - the only real separation is the billing.

That’s a different part of the network though. LLU as a concept effectively died when FTTC/FTTP came along, but it appears the core networks are still separate from each other. Without inside knowledge of how it actually is set up, the fact that IPv6 is not available on EE and Plusnet (while BT itself has had it enabled for years) would suggest it to be the case, as IPv6 enablement is a big task and it’s not worth doing if the medium/long term plan is to shut it down anyway.

If I had to guess, I’d expect that the task of replacing EE’s Huawei *mobile* core network with Ericsson is of far greater importance since it was a promise to the government.

Having worked in the world of broadband equipment, I can say with certainty that just because the EE or Plusnet router appears to be the same (EE went so far as to use a different case for theirs, even if it’s the same inside) then that doesn’t mean there have not been tweaks and differences to cope with different requirements, and that needs to be considered as part of any migration.