Aside from the F-16E, I doubt what you say.
ECM---The MLU is mostly for export, which is to say, the ECM is not as good as the domestic models. Pretty sure it lacks things like DRFM, and the US does not include a lot of things for the sake of trust. Another point, you don't know much about the state of ECM from the Chinese side. Having said that, the J-10 appears to be implementing a phase shifting directional beaming kind of system on the tail, which allows you to beam multiple beams at different points simultaneously. That looks pretty good to me. When anyone claims ECM is better than the other, one can always say, you got no empirical state to demonstrate that.
Better Radar---Not quite. The APG-66 was originally intended as a small, cheap kind of radar, not so powerful, made to fit size and price points, as well as for export. The original version cannot even be considered suitable for BVR. You can only cram and do so much into the basic design before you replace it completely (F-16E/F).