Flew out in OF 3K to YVR last week, returned in UD 62K. Travelled solo.

If I'm being honest, I much preferred OF.

- Lots of space and storage
- Bigger and wider bed than CW on UD - I slept really well
- Seat was pretty private (I can see why those in rows 4 & 5 would be unhappy, they are very exposed)
- The cabin felt quiet - and they had the lights off whilst they were still on in the main cabin, so made it easy to sleep
- Service was excellent, very attentive
- First off the plane in YVR (WT+ were off before CW). When I got off from UD at LHR, there were loads ahead of me in the border queue.
- IFE wasn't exactly the best, but I didn't think the UD IFE was much better. The screen was perfectly adequate, and the range of shows and movies the same. I watched my iPad anyway.
- You have more toilets available to you in OF and ISTR they're bigger.

All in all, I'd choose OF rows 1 - 3 every time. Otherwise I'd aim for 64AK or 62AK on UD.