IIRC, one of them said Pancho won too few prestige titles(3?) which was hard to rank him higher.
Gonzales won 2 US Championships as an amateur in 1948 and 1949. He turned professional in late 1949, at the age of 21, and was ineligible to compete in what we now know as the 4 majors, until the start of the open era in April 1968, by which time, Gonzales was about to turn 40.
In the professionals, Gonzales won 8 US Pro titles (1953, 1954, 1955, 1956, 1957, 1958, 1959 and 1961), 4 Wembley Pro titles (1950, 1951, 1952 and 1956) and 3 Tournament of Champions titles (1956, 1957 and 1958 ). He was twice runner-up of the French Pro in 1956 and 1961, with Trabert's 5-set win over Gonzales in the 1956 French Pro final denying Gonzales a professional CYGS.
On the 1954 pro tours, Gonzales beat Segura, Sedgman and Budge on the different tours. On the 1956 pro tour, Gonzales beat Trabert by 74-27. On the 1957 pro tour, Gonzales beat Rosewall by 50-26. On the 1958 pro tour, Gonzales beat Hoad by 51-36. On the 1959 pro tour, Gonzales finished top (47-15) over second placed Hoad (42-20), third placed Cooper (21-40), and fourth placed Anderson (13-48 ), and all of Gonzales' losses on that tour were to Hoad.
On the 1960 pro tour, Gonzales finished top (49-8 ), over second placed Rosewall (32-25), third placed Segura (22-28 ) and fourth placed Olmedo (11-44). And finally, on the 1961 pro tour, Gonzales finished above all his rivals in both the round robin format and the finals format, with his opponents being Gimeno, Hoad, MacKay, Olmedo, Buchholz and Sedgman.
Now, regarding Emerson, as good as he was, and he was by far the best amateur player in the 1960s, primarily because he stayed amateur for so long after winning the big titles, he was nowhere near Gonzales. The funny thing is, despite all Gonzales' achieved, he's probably best remembered for his 1969 Wimbledon win over Pasarell by 22-24, 1-6, 16-14, 6-3, 11-9.