Is there a better way to tell these ZBLLs apart?

[Halqrius]

Currently what I'm doing is recognising whether the left or right edge matches the headlights. Is there a better way to tell them apart?

 

[ruffleduck]

It's a CW and CCW edge cycle, so just see the direction in which the edges need to go

 

[xyzzy]

If you use oriented corners in front as your recog angle, compare the UF edge with the two corner stickers on UBL/UBR.

(I use oriented corners at the back as my recog angle (would not recommend unless you're learning full 2-sided recog), and the way I differentiate these two cases is by whether UF matches UFL or UFR.)