ISS vs FIFA was a big debate for a while, with 1998 probably being the biggest year for the argument. N64 Magazine clearly preferred ISS, but for me, I enjoyed FIFA 98 more. I do think I know the main reason why people prefer each one, as while they seem the same from a distance, they both have slightly different targets. FIFA is more about casual fun, while ISS is more geared towards providing a more tactical experience.
Which means that it isn’t a case of which one is better, but rather what kind of game you want. ISS 98 is a marginal improvement from ISS 64, focusing on the World Cup. In Japan, it had an official World Cup branding, but still not player names (other than the Japanese squad), but is the same game.
You do get a new set of scenarios, so if you liked those, these are the main new thing in this version compared to the previous year.
Which means that it isn’t a case of which one is better, but rather what kind of game you want. ISS 98 is a marginal improvement from ISS 64, focusing on the World Cup. In Japan, it had an official World Cup branding, but still not player names (other than the Japanese squad), but is the same game.
You do get a new set of scenarios, so if you liked those, these are the main new thing in this version compared to the previous year.
Another very solid entry in the ISS N64 games series. Improvements over ISS 64 are subtle such as more lines for the audio commentary, slightly improved graphics and added miscellaneous details (such as long-sleeve shirts for players in cold weather).
I know it's a bit blasphemous, but this one is better than FIFA 98.