He was a great player in the 90s, one of the real class players.
To compare him to his peers, I would rate him better than Michael Long and not quite as good as Peter Matera.
Peter Riccardi was better footballer than Michael Long, just wasn't recognised as much as Argentinian/Italian Recociliation wasn't a big issue at the time. He was a legend of his people and has done much to right the wrongs and rascism footballers of Argentinian/Italian heritage suffered. There will be a Argentinian/Italian heritage round one day Peter... one day.