It'll be interesting to see if the differences between falcon and peregrine are so significant that you can't swap ROMs between the two with some adjustments.
Of course they won't work out of the box, the modem hardware is different. And there's the external SD card. But if the remainder of the partition layout is the same, it shouldn't be too hard to support both trees at once.
As long as the threads are tagged properly this is a non-issue IMO. (See US and Canadian variant coexisting like the T889/T889V and I317/I317M.) They could also make a subforum like they have for other devices such as the Galaxy Ace S5830/S5830i or the Note II N7100/N7105