Hi,
I am new to this forum but i following this thread around one year or so.
I got this from strategypage if it's true then it's better to go for F-18SH or EF.
Welcome, always good to have new members!
Regarding that report / discussion, it's not only old but the source is known for such unreliable blame games.
The fact is just the other way around, Rafale like EF was designed with high agility and maneuverability in mind, that's why they chose the delta canard design, but also with low RCS and low detecability. Both EF and Rafale (just like LCA btw) contains high ammounts of composite materials, instead of more reflecting metall parts, what alone is a slight advantage in this regard, but more important is, that the reduction of weight allows to add more RAM materials!
Both fighters (again just like LCA) has ducted intakes, which means that the reflection of radar waves of the compressor blades is reduced to a minimum if at all.
The Rafale is the only fighter with canards, that uses saw tooth designs, made by RAM materials, to scatter, or reduce the radar waves hitting them and they did the same all over the airframe. The Mig 29K of IN has similar designs around the nose, obviously to reduce the frontal RCS and while saw tooth designs was effective at the F117 and still will be used at nearly any stealth fighter as an feature to reduce the RCS, but only for Rafale it is claimed to be a bad idea?
The fixed refuelling probe will add to the RCS of course, but you have to put it in the right context! We are not talking about stealth fighters without external loads and stealth shaped airframes here, but about 4th gen fighters, where even the wingtip missiles that many of those have, are bigger than this refuelling probe, let alone the fuel tanks. Dassault purposely went that way, because they thought the ammount of RCS reduction is not equal to the costs of developing and maintaining a retractable probe. We interestingly see the same decisions now at LCA and if I'm not wrong at J10B as well, that both seems to get fixed version.
It is debatable of course if that is a good decisions, but it's a fact that any external load will be a bigger issue in this regard, that's why the F18 Silent Hornet will never be stealthy as well, as long as it carries missiles at the wingtip stations, no matter if the other weapons will be placed in the weapon pod.
Another hint that Rafale was designed for beeing less detectable is the low IR signature and you will find several pics, or even videos comparing this on the net.
For all non 5th gen fighters, the overall size of the fighter, external loads/parts, amount of composite/RAM materials and ducted intakes are the most import points in regard to RCS during operational scenarios. The Rafale might compromise on some points, but is better on others as well, just make your own conclusion what ways more in this regard.