The earlier departure has 1 Z seat available via DFW. That said a 777 MIA to LAX sounds kinda nice even if there's a long wait at LAX.

Here's the availablity display for the 13th from MIA:

13DEC-SA MIA HNL ET HT
11 AA 529 Z4 MIADFW 848A1100A 8 S80 B 0
12 AA 123 Z0 HNL 1145A 409P 8 763 LS0
13 AA 245 Z2 MIALAX 815A1041A 9 777 B 0
14 AA 251 Z7 HNL 300P 638P 4 763 D 0
15 AA 371 Z7 MIADFW 634A 841A 9 757 B 0
16 AA 5 Z1 HNL 1005A 227P 8 763 LS0