Flew the 350 last Friday in Business class MEL-BKK. I liked it in all aspects. One (male?) toilet was quite enough for Business class. Food was excellent. The lighting was quite relaxing. A VERY quiet airplane.
On the BKK-KUL sector in Business class I flew the 777 ER. A shorter flight and thus easier on my 195 cm body. No idea about comparing it to the 350 since flight duration was so short, BUT the 350 had more relaxing lighting and was noticeably quieter....