Z5 Premium VS Z5

hi guys,
for the Z5 Premium owners or the others who can give an advice... please which is the best and worth to have more than the other... The Z5 Premium or the regular Z5 ??

can you guys share with your experiences with Z5 Premium, the cons and pros ?

anything necessary before i take the decision whether i get a Z5 Premium or the Z5


thanks for any advice provided.

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