RTT vs. Neumann

I don't know how many of you can respond to this, but I'll still ask:

Have any of you compared an RTT VM100 (Russian Transducer Technology) to a Neumann M147? They're both tube and fixed cardioid with the VM100 looking to be about 1/4 smaller than the M147. Also, in comparison, I'm looking at the sound qualities and not the price difference.
 
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