>>Too bad - I was interested in the execution plans and the speed test difference. Can you at least run both statements in SSMS and check actual execution plans to see if distribution is equal (50/50) or not?
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>Under SSMS, I always have instant result. I have never been able to simulate this problem in SSMS.

Sorry, you misunderstood. I wanted you to run both statements in SSMS in order to compare execution plans. It doesn't matter if they both are too quick.