Hi wegelato!
Having two E61 HX is better than one, isn't it
When I saw the Euro2000, it immediately remembered an Isomac to me. And I love Isomacs look. The Butterfly is a great machine, extremely well build and solid, but I find the retro look missing (on/off switch, for example...). Then, when saw the internals of the E2k, I realized that it seemed to be well build also.
I confirm that looks like the Millenium and that the boiler seems to be the same.
As it's rather impossible to find second hand Isomacs in Europe, I do go for it. It's done

Best is that the Euro2k is more compact than the Butterfly, so will better fit in the kitchen. And it's all stainless outside. Great!
Cheers