The combat range of the Gripen is 1,300 kilometers, while the F-16's combat range is only 550 kilometers.
And yet Gripen lost competition in Switzerland(!) in a2a category because of
range - it couldn't even reach the furthest corners of the country half the size of Chongqing. Surely, with 1300 km of range, it should be able to fly combat missions to Moscow and back?
Like, maybe (hint) you're comparing two incomparable numbers?
The Gripen can carry a payload of 7.2 tons, compared to the F-16's payload capacity of 7.6 tons.
7.2t number for Gripen E is basically MTOW minus empty weight. Which is very technically right, but de facto it's a commercial trick - what should matter is usable payload @ range.
A similar number for F-16 from blk 50/52 onwards is around 11.5t, not 7.6t.
The Gripen airframe contains a higher percentage of carbon composites, making it lighter and giving it a smaller radar cross-section (RCS) than the F-16.
You don't know the exact numbers, even if it's not unreasonable to expect Gripen to have a smaller RCS frontally. But how much smaller, and is it small enough to matter anything - is a very tricky subject. What we know for sure, though, is that SABR is simply a larger array.
Lower RCS relationship with the composite percentage in the airframe is about the same, as the correlation between summer icecream sales and increase in crime rate.
Composite % is about weight.