The main difference between Antibo and Panetta was that Antibo never was interested in running Marathon, because he had a very good coach for 10,000m (Gaspare Polizzi) that didn't like road races, in Italy at that time we had Gelindo Bordin Olympic Champion in Marathon, and really he was,in 1990, the no. 1 in the World in 10,000. He could be the first man breaking the barrier of 27' (before my friend and collaboator Yobes Ondieki), in 1990, if was less disturbed, mentally, by the presence of Hammou Boutayeb in the same race, that he won easy in 27'21". One of the worst Antibo was able to run in 27'16" in 1989. During the preparation for that race, we were in Sestriere (2050m), and Antibo and Polizzi arrived 2 days before me. When I arrived, I almost had an accident with a crazy Polizzi, driving his car very fast, with Antibo on the rear seats, having an ankle big as a melon after a very bad sprain. Polizzi was in Antibo's room for 10 days, using ice for a lot of hours every day, before Antibo could run again. When he started running, was not able to run in any turn, and continued running in a furlong of 600m on tarmac, stopping at the end for turning walking, and after starting again. In this way he went running 2 hr. After 10 days in the room, and 10 days with only long run straight, Antibo came back to Sicily, and next week ran the Regional Phase of Italian Club Championships as a test for Helsinki. During the first day, he told to all the runners that he wanted to test himself, running one lap in 64" and one lap in 1'15",so nobody had to follow him : he won in 29'07". The next day he went for 5000 even pace, running 13'37". After 4 days, in Helsinki, destroyed the National Record in 27'16".
But the Antibo 1990 was very much better.
After winning both 10000 (with the first lap in 59" and a "solo" race controlling the other runners 200m behind) in 27'39" and 5000 in 13'22" in European Ch., he had in Sardegna a car accident : his car rolled out of the road, stopping against a tree, and he had a strong impact between his head and the top of the car. This accident provoked the problem that, after one year, started to limit his activity, so never could go to Marathon, how was his wish before the accident.
About Panetta, he really wanted to move to marathon already in 1993, but his preparation was wrong. He went for a lot of km not fast, and this increase in mileage became a good base for his main qualities, but nothing to do with the specificism for a marathon. The result was that he improved, after 6 years, his PB of 5000 in Zurich, moving from 13'15" to 13'06", but was not able to finish the marathon. I remember that, before Rotterdam 1993, speaking with Gianni Demadonna (his manager and friend), I gave Gianni an envelop with a paper where i wrote the km that Panetta could run. I wrote "29", Panetta stopped at 27.
At the end of his career,Panetta wanted absolutely to finish a marathon, and this happened in Torino, where he ran 2:15. His main problem was that he never had the patience to change his physiology, thinking of marathon as an extension of 10,000m.