Now for comparison.
Same song tries on both. The old we found of vociferous, Saette better as the UE. The design of the new we did not look as good as the predecessor. Just a matter of taste. Robust we found both the newer box.
Conclusion:
Who puts more value on robustness should buy the newer version.
Who but more emphasis on sound quality and design and will save almost 20 euro should unhesitatingly take the predecessor. Both devices are top. Familiar Logitech quality.
3 stars because for me the sound quality is the most important primarily in speakers. In addition, for 20 Euros more I should get even more besides improving the robustness and loss of sound quality.
Hope you have given an insight.