A Ferrari 355 (im guessing that is around a 97 model) doesnt have a whole lot on a 996 (at the oldest and slowest a base 98 model). Cabt tell from the shot if that is an S model or a GT3 even, or just plain modded by owner as is the case with FAR more Porsches than Ferraris. With a few mods that a guy making Porsche payments can certainly afford to get done, that 996 should smoke a 355.
Either you underestimate Porsche cars or you think too highly of older Ferrari models.