Sure, Jason; enclosure volume is a key spec in tuning it for bass extension. This would help in achieving what Ian stated above as an intention to keep "every detail" as close as possible to the M60.

I know the volume is a key spec for bass tuning, I was thinking about this extra volume possibly causing an issue for proper tuning, but I guess the ends could always be sealed off if a smaller cabinet size is required.

No; it needs to be bigger to more closely match the M60 bass capability.

Most importantly, does it come in anything but black?

They're calling it the Model T60.

Then i'm waiting for Model T60v3

It just hit me that the VP160 looks a lot like the old Rocket RSC200...

That's the one I was referring to earlier Nick......

That was my first thought when I saw the VP160.

One difference would be the cabinet shape for internal standing waves.