The OMF has the following flaws compared to the Noob:
- wrong height (15 instead of 14mm)
- wrong date window and font
- bezel numbers seem not to be centered properly (too near to the crystal)
- weird triangle and pearl
- overall finish seems to be worse than the Noob
There's a V2 out now which seems to have corrected the height and date window shape and it doesn't have the WORLDPREMIERE flaw like the Noob, but apparently no one has received it yet.
It's up to you whether those flaws are worth the 100$ price reduction.