No, for almost every engagement. Bilan Carbone® and GHG Protocol are compatible with each other and with ISO 14064-1: the same gases, activity data and emission factors, mainly those from ADEME's Base Empreinte. Collection, representing 60 to 70% of an engagement's cost, is identical. Only the report structure changes: 11 activity categories for Bilan Carbone®, 15 upstream and downstream categories for GHG Protocol. Since Bilan Carbone® V9, published in July 2024, switching formats requires a few hours of formatting. A quote that varies by method needs an explanation from the provider.
Read the source article: GHG Protocol or Bilan Carbone®: which costs less?