Q1. What would run faster?

[Mikhail Berman]

Dear List,
 
I am looking to see what the List thinks about this question.
 
If we to run the same query that needs tmp table to be open to get an
answer.
* on a server with 
* and without an RAID array, the rest of hardware would not change as
much as possible.
 
Where this query would run faster?
 
Regards,
 
Mikhail Berman