You can check which box you have here
If you have TiVo then yes, you'll need a box-swap as the V6 & 360 use the same hardware but are otherwise different. And V6 & 360 both need VM broadband, unlike the TiVo.
There are some equipment shortages in some areas at the moment, and stock is sometimes being reserved for fault swaps - this may be what you're getting.
And purely by advice, although the choice is ultimately yours - make sure you genuinely want 360 before changing. Functionally, the TiVo platform (which both TOO & V6 use) currently has some advantages over 360. The new software has some features like profiles and voice control - but I'm suggesting you choose the migration because you want to.
A change to 360 is a one-way trip which can't be reverted.
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