The 747 cabin is so much more spacious. Walls don't curve in as much as on Airbus a/c particularly in the front (not that it matters that much in FC other than you're seated at economy seat's width away from the window) and ceiling is higher (not as much as in the back, or in 777s). Being in the nose means there's no noise or traffic up front (1A and 1K) are great unless people specifically want to go there. Also, the FC lav is on the right side of the 343 so you have to go through one of the galleys to get to it if seated on the left.