multi-language VM or multi-VM language, which one to choose?

I know there are arguments in favor of intermediate languages [1]
(e.g., ICode) later targeting JVM and CLR, but it would also be
interesting to hear the pros and cons ?as-seen-from? the camp that
favors using as intermediate language the intersection of Java and C#
[2], [3].

Pointers to literature on that are welcome!

(BTW, I believe that "Scala--" [4] *is already* that intersection language)

Miguel

[1] Intermediate Language Design of High-level Language Virtual Machines
3rd workshop on Virtual Machines and Intermediate Languages
http://www.cs.iastate.edu/~design/vmil/2009/papers/p08-marr.pdf

[2] http://en.wikipedia.org/wiki/Comparison_of_Java_and_C_Sharp

[3] http://www.geeks.ltd.uk/Knowledgebase/Compare-c-sharp-java.html

[4]
http://www.sts.tu-harburg.de/people/mi.garcia/ScalaCompilerCorner/ScalaM...