Your analogy is WAY off. I would actually give the Gripen excellent odds. The Eurofighter is an expensive piece of junk. Its not like it has a huge advantage over the Gripen. The Swiss trials and Indian trials have actually proven the Eurofighter to be a mere paper Tiger. The Gripen isnt really the best of the lot either but at least it makes a lot more economic sense.
Really? Most of the sources I have read have said that the Gripen is outclassed in pretty much every category except cost with the Eurofighter.
I can certainly agree that the Eurofighter project has been ruinously expensive and undercapable for the cost, but for all that, it is still a better plane than the Gripen.
As I alluded to, a Gripen might get lucky in the hands of a skilled pilot, just as the Gloster Gladiator won air battles on occasion over ostensibly more advanced German aircraft, but all other things being equal, the Eurofighter is going to win.