The difference between a notice of inquiry and an invitation to quote

The difference between an RFQ and an Invitation for Quotation is that an Invitation for Quotation is sent from the buyer to the seller and an RFQ is sent from the seller to the buyer. According to the query related information, the invitation for quotation requires the seller to provide the price and technical parameters, while the request for quotation only requires the buyer to provide the price. The invitation to quote may require the seller to provide services, while the request for quotation does not require the buyer to provide any services.