indonesia has some potential problems with malaysia which has good flankers. its okay with australia now but should warrant something to match their f-35s and singapores f-35s as well. in that case j-20 might not cut it because of its lack of power and questionable radar technology. pak-fa it is.
egypt depends if saudis will buy it for them. in which case j-31 probably fits them better because russia will not dare anger israel.
actually i disagree. the j-20 probably has developed avionics, radar, etc. the design shows stronger focus on stealth but at the sacrifice of subsonic manouverability. pak-fa is reverse, they sacrifice some stealth with the inlet and exposed engines but likely better manouverability at both supersonic and subsonic.