Cubic rate cheaper via AZ than via Stamps. Correct?

[DirkMartin]

Whenever I need to ship an Amazon package that qualifies for cubic rate, Amazon's cubic rate price is ALWAYS lower than the cubic rate offer via Stamps.

Can other users report if that is true for them, also?

[MERCHnet]

Yes, always use AMZ for Cubic.  If you're shipping to Canada or out of the country then another service would be better there as far as savings.