I’ve flown 4 of the 6 birds - once I’ve flown all 6 I’ll try to write up a guide.

For now MTX/W and V have the older style seat with the dome light. On these 3 - 2A and 2K are real “windows” but those 2 seats are terribly exposed. Also don’t like the seat much. No place to keep stuff.

MTZ - has the newer version without the dome light, and 2K doesn’t exist. It’s 2H/3K and so forth. This version is quite a bit better with more storage.

No idea about MTU/Y - I’ll find out eventuality. Thing is you won’t know until the day as they don’t change seatmaps to suit the actual plane flying.