The LEDs are physically the same on the Classic and -400, but known by different terms and extend in a slightly different sequence. The inboard set on the -400 are Krugers, they are known as set 4 on the Classic.
Selecting flaps 1 on the Classic will extend sets 2 and 4, the inboard third (Krugers) and the out board half of the middle section. Selecting flaps 1 on the -400 will extend the inboard and middle sections.