Assuming both soundfiles are stereo, which of these constructions is best for mixing x number of files together? They seem to be produce the same result, at least to my ears...
(Each [*~ 0] is controlled by a slider.) 

[ readsf~ 2 ] [ readsf~ 2 ]  
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[*~ 0] [*~ 0]
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[*~ 0]
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[dac~]


[readsf~] [readsf~] 
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[*~ 0] [*~ 0]
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[*~ 0]
| |
[dac~]


Thanks,
Peter