base shear and lateral displacement value not matching with etab model

Dear sir,

Base shear gets by staad model is coming 269KN which is not matching with etab model (base shear 500kn) prepared by consultant.Also lateral displacement on siesmic cases is more in etab model than staad model.Can you explain why staad model is giving less value than etab model.Both models are attached. etab model https://we.tl/t-aXzk4VUVfc  staad model

BUILDING .std

Thank you in advance.