これとあれとでは、どちらが安いのですか。

English Translation

Which is cheaper, this or that?

I feel something is lost in the translation: I would say:
Which way is cheaper: with this (using this), or with that?

@mike-lima Sorry to say, but the original one is more accurate than yours.

これとあれとでは、どちらが安いのですか?
これとあれ、どちらが安いですか?
These two sentences means exactly the same though the second one sounds a bit more informal.

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