I've got both the E47 and Korby 4-head mic.
Regardless of what they are 'based' on, I find them both to be quite usefull - particularly on vocals.
I find the Korby has a more 'intimate' sound while the Soundelux is more laid back although a tad bit brighter.
If I had to choose all over again - I would get both.
They are both wonderful and big sounding.