Supercruise is nothing new- the Lightning (English Electric, not P38) had that in the 60s. The Typhoon's loss of stealth when carrying stores is a tradeoff- no stealthy platform can carry nearly as many weapons as an aircraft with external weapon mounts. Furthermore, a stealthy aircraft suffers both stealth and performance losses when it opens its armaments bays.
Where the Typhoon's stealthy credentials are real, however, is in practical application. Admittedly, the F22 is far stealthier- but assuming the Typhoon has, at a conservative estimate, 50% of the radar signature of the F16, that means that to cover a given area an opponent has to deploy 4 times as many radars to counter it. While 50% may not seem much of a leap over the previous generation of fighter, it is a huge step when an entire radar net has to be rebuilt, and new doctrines developed for its use.
The Typhoon's other strength is as a weapons system. From the start, it was designed to be easier to use than previous generations. Individual Russian radars and missiles may be technically superior, but I suspect the Typhoon's level of system integration is some years ahead of any potential opponent.
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