Other then being able to create an Assembly and Feature models, I don't think there's any other requirement.
Deformable Component Definition comes with the User Defined Feature License, and this one is not included in Mach Advantage.
To verify, please look into the license log of the license server. If it does not include a DENIED entry, set the variable FLEXLM_DIAGNOSTICS=3 on the NX client machine. This will report any request from NX to the license server that is not available (not all of them are errors).