One is with a foot number of 31XXX and the other is with 35XXX. Some parts are different between these reels.
31XXX: 4 pillar screws on the left plate, dotted inner plate, Oil-Oil marked handle nut.
35XXX: 3 pillar screws on the left plate, smooth inner plate, Oil marked handle nut.
The spool is all black with a thin core in both reels.