Parasolid: kernel-native
Cleanest transfers between NX, SolidWorks and Solid Edge.

Parasolid (X_T / X_B) and STEP both carry precise solid geometry, but they serve different goals. Parasolid is kernel-native and excels between Parasolid-based systems, while STEP is the universal neutral format any CAD can open.
Cleanest transfers between NX, SolidWorks and Solid Edge.
Openable by virtually every CAD system, ideal for broad sharing.
Use Parasolid for Parasolid-kernel targets, STEP for everything else.
Choose Parasolid (X_T / X_B) when both sides use Parasolid-based CAD and you want the cleanest possible solid transfer.
Choose STEP when the recipient’s system is unknown or varied, or for long-term neutral archiving.
Convert STEP to Parasolid to feed a Parasolid-kernel system, or Parasolid to STEP for universal distribution.
Both directions preserve precise solid geometry.