The two accounts of every lost deal
Ask a salesperson why a deal was lost and you will usually hear price, timing or a competitor. Ask the buyer and you hear something more specific: the proposal was hard to compare, nobody followed up after the site visit, the other supplier answered a question about warranty that you never addressed, the person who championed you left.
Neither account is dishonest. The salesperson is reporting the last thing they heard, which is usually the polite reason a buyer gives to end a conversation. The buyer is reporting the actual decision. The whole value of win-loss analysis is the systematic difference between those two, and you cannot get at it without talking to buyers.