Actually the suggestion that it could be a striker fighter comes from the title of this thread that include the designation JH-XX and also the smaller size of the speculated striker/bomber jet as shown in the posted CG and pictures.
Oh okay, I see what you mean now.
The way I see it, "H-X" refers to the strategic bomber project which we know is currently going forward via the stealthy flying wing, and most likely won over the canard-delta supersonic configuration in a previous comparison of designs.
OTOH, "JH-XX" refers to a different project that may or may not be currently in work, and in discussion here, mostly refers to the "mysterious black model" with lambda wings resembling the YF-23, with the idea that it may be "JH-XX" mostly arising from length estimates of the model as well as the presence of a side weapons bay for AAM. Other, less notable possible aircraft projects for the "JH-XX" category include the possible "Sino Su-34" that might be under development (which technically has canards but in terms of origin is likely unrelated to the canard-delta supersonic design, given its heritage would be from flankers while the canard-delta supersonic design would likely be original clean sheet), and possibly "JH-7B" in some form, though the latter two are generally not as high profile as the "mysterious black model".
So going back to the canard-delta supersonic bomber, I'd argue that while it is possible it could be the JH-XX, the premises for that conclusion are shaky:
The last few posts have shown that even large strategic bombers can have canards -- they may not function like canards on a fighter, but there's no reason to assume the canard-delta supersonic bomber proposal functioned like canards on a fighter.
More importantly, the canard-delta supersonic bomber was said to be in competition with the flying wing, which is now known as a strategic bomber. Unless the air force has very loose terms for what "strategic" means, there is a high likelihood that the original flying wing proposal and supersonic canard-delta proposal both featured similar performance in the important "bomber related" aspects, namely payload and range -- or putting it another way, from what little information we have at present, I think it is prudent for us to believe that the supersonic canard-delta proposal was indeed for a strategic bomber aircraft, not a strike fighter, and thus we have no reason to conflate it with JH-XX at present.
If new information comes to light that the supersonic canard-delta design was re adapted and made smaller for a new JH-XX project, or if it comes to light that the original competition for H-X was between a strategic bomber sized flying wing against a much smaller supersonic canard-delta, or maybe if both the flying wing and supersonic canard-delta are smaller than what we think (aka not "strategic bombers") -- then I would gladly stand corrected.
However we don't have any suggestions of those things at present, so going back to your post #295, I think that with the limited information we have at present, there is no reason to believe that the supersonic canard-delta and the flying wing were not competing for the same "H-X" project (now tentatively called H-20), and also no reason to believe that the supersonic canard-delta was meant for the "JH-XX" project (if it even exists).