This depends on the actual situation, not simply good. Let's not discuss the aerodynamic effect and function of the canard, just look at the stealth effect of the canard (it's too complicated to discuss the aerodynamics, enough to write a paper).

First of all, different aircraft have different radar reflection intensity areas, some have strong fuselage reflection and some have strong inlet reflection.

Without deflection, the canard has a low reflection of radar waves from the front because the front projection is a line. In the case of deflection, it will be more complicated, divided into radar waves above the canard surface and radar waves below. But no matter which direction the radar wave is, the deflected canard has a strong refraction effect, which can cover the objects behind the refraction zone.

So if you want to cover the radar reflection of the main wing and the wing-body joint, put the canard on the same plane of the main wing or in front of the wing-body joint, such as our J-20 and J- 10.

If you want to cover the air intake of the engine, put the canard near and above the air intake, such as the French gust (in fact, the gust covers the air intake including the outer lip extending from the nose, and the canard also covers the wing body fusion).

In this way, the canard can cover the area with the strongest radar reflection on the plane and improve the overall stealth effect. Therefore, for the same canard plane, the best hiding position is * * * or not * * *. Designers are not fools, they must choose the best position.

For different aircraft, * * * aircraft and * * * aircraft are not comparable. After all, the strongest reflection area on different aircraft is different (for example, gust and J-20, the gust inlet has strong reflection and needs to be covered, while the J-20 inlet is much weaker and needs no cover. If you insist on changing the gust canard into a * * * plane, the consequence is that the gust canard will be placed outside the intake, completely.

Here again, we only discuss the stealth coverage of canard position, without aerodynamic discussion, because the function of canard design itself is mainly to follow the aerodynamic control conditions, whether it is close coupling control or just strake wing, the requirements for position are very high.

The biggest stealth difficulty of canard aircraft is not canard itself, but vertical tail. Due to the vortex generated by the canard, the vertical tail of the canard aircraft must be made very large, otherwise it can't work effectively at a large elevation angle (the J-20 is solved by using double full moving tails). Therefore, the side stealth ability will be greatly reduced, but the front stealth effect will not be affected.