EVA also flies 777-ER and here is their comparison: (by seatguru.com)

EVA Y, 3-3-3, pitch 33, width 17
CX Y, 3-3-3, pitch 32, width 17.5

EVA Y+, 2-4-2, pitch 38, width 18

Estimate CX Y+, 2-4-2, pitch 36-38, width 18