This is the same argument that happened during the development of the Dan-C4, the volume kept creeping up and everyone was worried it would be just another M1. But what followed was that Dan was able to articulate other value propositions / distinctions of the case (design language, part compatibility, etc.) that would make the case standout against the M1.
I imagine with the volume increase
@Lytnin would have to do the same thing. As mentioned before with the trend in over-sizing hardware, even Dan is now considering increasing the volume of his signature A4 to 7.6L - haven't seen anybody say that's too close to a Ghost S1 volume / all other Taobao clones.
Sure it would be nice AND simple to just pointing out a single number to potential buyer as the only signifier (it's basically the same problem in any consumer good industry, my current company included). BUT just because the volume of the Rogue is very close to the T1 does not mean the Rogue has nothing else to offer.