FIFA has gained the upper hand on PES by copying its ideas and outspending it, says Konami.
PES, the dominant soccer franchise of the last console cycle, has been thoroughly outsold by EA's FIFA this generation.
"They've obviously gone from a game that was totally different from PES to one that started copying PES to one that started taking areas PES did well further into the product they have now," said PES team leader, Jon Murphy.
“They have a long history of copying PES to get to where they want to be. People shouldn't forget that's how they got where they are.”
He also attributed the sales gap between the two games to money spent on acquiring exclusive licences and marketing.
"Opinion has turned against PES in a way that's been helped along that isn't necessarily borne out by the quality of the product recently," he said.
"There's an automatic assumption now that FIFA is just better."
Konami last bid for the English Premier League license in 2003. Since then, EA has gone so far as to deal with individual clubs.
"It should be pretty obvious that we can't compete with the massive budgets they have to throw at these things," said Murphy.
"The reality is, EA is a massive company with large chests of money... we can't fight against that.”