I assume Voltra will be the generic game given to all future electric buses? In the same way that XLines is the express brand. The ‘red spare’ being branded as “Voltra” suggests that it will perform a similar role to the Black XLines buses in time ie. being used to cover across the Voltra network when future electric buses enter the fleet.
The problem I have is XLines makes sense as a brand, Voltra doesn’t. XLines represents more than just the bus type, it is about passengers being able to identify the gold XLines as express buses that get somewhere ‘quick’ or at least more ‘direct’. Whereas Voltra says nothing about the type of service just that it’s an electric bus, which is good, but if it isn’t going to the right place, the electric bus doesn’t really matter...
EDIT: Also, the two promo videos I’ve seen are missing four crucial words at the end for me... “from Go North East”.