Possible Discrepancy in PS & Interim Report II: Dale V. Fry Taste Test

[Haggridd]

No: HPFGUIDX 18079

While listening to PS for the first time from the Steven Fry 
recording, I heard the conversation between Snape and Quirrel in 
chapter 13, and I thought to myself that, while it certainly gives 
the impression (albeit a false one) that Snape was trying to obtain 
Quirrel's method of protection in order to steal the Philosopher's 
Stone, I could not construct an alternative innocent explanation for 
this conversation in light of what we all now know about Snape and  
about Voldemort.  Perhaps this was addressed in HPforGU a long time 
ago.  If so, could somebody give me a reference?  If not, does anyone 
have any theories to account for this conversation?

IMHO, Fry reads a much better Snape.  Dale's is too much a cartoon 
villain's voice.  I also prefer Fry's reading of Argus Filch.  I 
think that Dale's Dumbledore, however, is superior to that of Fry.  
He gets the essential ambiguity that Dumbledore intends to convey in 
many of his comments exactly right, with a properly deadpan delivery 
when necessary.

Haggridd