"range fully loaded":
A342: 8000 nm
A343: 7400 nm
A346: 7750 / 7900 nm (depending on engine)
the corresponding figure for the 777 would have to be "max. payload range":
B777-300ER 5500 nm (Reply 31)
The figures given above are for full passenger payloads on the A340's but MZFW payload on the 773ER. The full passenger range for the 773ER is comparable to the A346IGW, about 7900 nm.