Same gun with different configuration. OPs Loaded Operator was a newer version with Front strap treatment while the original one has rubber grip without front strap treatment.
Loaded Operator was discontinued with introduction of refreshed Operator production lineup. The original MC Operator is still in production specifically for California compliance. MC Operator and Pro Operator are the only two rail SA 1911 on the CA compliant roster. Pro production is also gone that leave MC Operator the only railed SA 1911 for CA market.