A lesser RCS should be better, unless it prevent the aircraft from doing something particular.
It’s better because it delays detection and ease the job of ECM.
But up to now, Rafale manages to be light, very agile, versatile and on budget because it did not sacrifice too much to passive stealth.
I believe that had it been developed 20 years later, progress would have made Rafale stealthier. But still using TF so as to increase the chances further.
Being stealthier and using TF don’t exclude each other. They contribute to survivability among different things (mission planing, tactics, ECM, etc).
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