The Eurofighter has more engine power and two of them. It will give us the additional safety over the North Sea and mountains. The EF group has met all finanical and technical requirements although cost is still not set in stone.
The Gripen-N will have twice the range of the original Gripen. ESA radar, very short take-off and landing (5-600m or even less), Designed to be used from "dusty" roads and highways just like the Viggen. It will cost less in purchase price and the life cycle cost is lower, and all the weapons we want to put on it will be integrated within the purchase price. It is designed for much fewer maintnance hours per flying hour than any of the competing progams.
I started off as a JSF fanboy, then moved to EF and now im leaning towards the Gripen-N but still the EF is a big contender.
If i could choose right now I would go for the Gripen-N in combination with the UCAV system the swedes are working on and the Taurus cruise missile.