Lucky you!
Thai has seven 777-200s, which (at the time of delivery, may have been changed since) were configured for 2-4-2 in Business and 10 abreast in Y class; total, 358. These aircraft are the baseline models, not ERs and were intended for use on high density regional flights, such as Osaka, Hong Kong, Taipei, Japan, Seoul etc.
The airline also operates A330-300s in a "normal" layout, i.e. six abreast Business, 2-4-2 Economy, which operate much the same routes and slightly wider afield too (i.e. PER, middle east).
The two aircraft types "cut across" each other, particularly if TG were to/has (this has been discussed by them, but not sure if they have acted on it) reconfigured. Trouble is, if they do bring the 777 to a standard density layout, it puts the aircraft's capacity in the A330 class, for the same routes. This is unfortunately another example of TG's aircraft selection not being clearly thought out.