B777-300ERs:
A6-ETA/B/C/D/E/F
J28 Y384
Previous J Class (aqua)
A6-ETI/J
J28 Y384
Current J Class (brown/grey) - to be reconfigured to J40Y340 soon
A6-ETG/H/P/Q
J40 Y340
Current J Class (brown/grey)
A6-ETK/L/M/N/O/R
F8 J40 Y280
Current J Class (brown/grey)
Note that those registrations with the same config but different J products are not 'sub-fleeted' separately, therefore you can get either J product on a particular flight. The order of A/C, H/K seats is different between the two versions of J Class, i.e. the old one starts
5A, 6C, etc. and the new one starts 5C,
6A, etc.