Anka-3 and KE are quite different aircrafts.
Anka-3 is subsonic. Being a flying wing, it can not go supersonic. But due to its airframe design, it is theoretically a true Low Observable plane. It should have a very low RCS value, especially when married with TF6000 engine. It will have 2 internal weapons bays, each able to house bombs and munition up to 635kg. This is a true deep strike weapon that will perform SEAD/DEAD missions as well as ISR and EW.
Where as KE is a supersonic air interceptor plane, it can carry out bombing missions as well. But it will probably do this from a somehow, stand off distance. It‘s canard design, detracts a little from the total low observable form. Nevertheless it should have a much better RCS than any 4.5 generation fighter jet, especially with RAM paint applied. A canard design is also known to provide good supersonic flight and excellent supersonic and transonic turn performance, and improved short-field landing performance compared to the conventional delta-wing design. So KE should lend itself very well as a carrier operated aircraft in the future.