BioPAX or SBML?

Katherine Mejia asked this question on twitter, well just now I want to keep it short,

• Both BioPAX (Level 3) and SBML (Level 2) can encode signaling pathways, metabolic pathways and regulatory pathways, although SBML can represent finer details.
• If your aim is simulation and prediction then SBML seems to be reasonable choice.
  
• SBML has better software and API support than BioPAX, no doubt this one is major advantage with SBML.
  
• Similarly BioPAX is rich standard when it comes to encode the interactions such as genetics, molecular or non-molecular.
  

Visual comparison of SBML, BioPAX, CellML and PSI

BioPAX or SBML?