A refresh, as I am currently upgrading (retrofit) from LED to Full LED (high) taillights. Here is what I have found out:
1. The regular LEDs have LED taillight, LED reveres and LED fog light on the inner cluster (left inner cluster for left hand drive, the right inner is just a dummy closure, no LEDs included, for UK it is opposite).
1. Full/High LEDs are a bit brighter and the inner lights also have taillight extended, reverse on both inner lights, but the fog light stays only on one inner light (EU version at least). They also have this extra cross lines on sides, which illuminate. The regular LEDs have sides 'flat' and they do not reflect a light.
I have some pictures from this upgrade (not finished yet) and will upload motre soon.