Yes if people can agree it's
may be able to see rather than
can see, there's a difference. The other difference is that this article clearly words it like they've done it. Which they haven't. It's very obviously a poor propaganda piece that can only be believed by very very naive people. These wishy washy articles are pathetic. First they say it can be done (despite no scientific evidence to support the claim btw claiming something is possible in theory and therefore can be done is not scientific for the technically illiterate readers out there). Then they say stuff like this and that should be able to do something like meh. The ambiguity removes responsibility in journalism but the whole aim of misleading Indian chauvinists is achieved because the gist is J-20 is unstealthy and not a problem for us. Their claim anyway.
If su-30MKI can detect J-20, either J-20 is completely unstealthy and CAC is misleading all of China because China posses many superior radars to Indians. That much is pretty undeniable unless India possesses secret radar technologies that they are hiding very well. Or Bars radar (Irbis on Chinese Su-35 is superior) is able to detect a stealthy J-20. Therefore PLAAF is lying to all of China with their claims that the VLO J-20 is groundbreaking for them and no 4th gen were able to touch it in mock fights. Gee who to believe. The proven manipulator/liar or PLAAF and CAC who have so far seemed to deliver and has so far not been caught out lying... I guess they're just great liars. Indians managed to slaughter Eurofighters and Eagles in all their exerrcises.
They must know what they're talking about.