I am unsure about BAMSE...the Swedes' put the project on hold indefinitely. Hence I see the Pakistani forces looking at the VL-MICA...which is a system similar in scope to BAMSE. If procured with local production rights & capability, I think the next goal would be to develop it into a medium-range SAM similar to Aster-15 & ESSM. By using a standard-set of SAMs throughout the forces the military can save considerably on logistics and maintenance.
Regarding FC-20. I think it is a 4.5 generation fighter based on a future/upcoming J-10 variant, but customized to PAF requirements. One thing to remember is that J-10's successive variants are not super-radically different from each other. Compared to the J-10 you see now, and the platform FC-20 will be based off - the measure of difference would be like F-16A to F-16E.
For instance...increasing J-10's stealth (or decreasing RCS) would encompass:
1) Further use of composites in the airframe (unless already extensive)
2) Changes in nose, canopy & intake - maybe major or minor, can't say.
3) Embedded wing-load - i.e. missiles not sticking out, but external.
The PLAAF will be using the new J-10 for primarily air superiority, PAF wants sophisticated strike - hence the FC-20 difference.