I assume you have access to classified information on both aircraft.
Your 'stealthiness' assertion is baseless, although the pak-fa's intake inlets are not shielded yet, there is no guarantee that the J-20 has an overall lower RCS. The J-20 canards and wing geometry doesn't exactly guarantee anything. Further, a panel that is not plush with the rest of the aircraft can increase the overall RCS by a factor of 3, and one picture indicates that the J-20 does not have a plush panel.
As for weapons and fuel load this is utter rubbish, there is little information on both. And I wound be careful when proclaiming the J-20 to hold more fuel even if it may be a larger aircraft. Fuel capacity is directly linked to area, by this I mean available storage. The pak-fa has a very large wing area, furthermore, it does not have an curved intakes that take up room in the fuselage.
And engines efficiency coupled with factors such as drag and wing area dictate range. Fuel capacity alone means little when an aircraft has poor efficiency, high drag, ect.
As for maneuverability, again, there is no information published on either aircraft and maneuverability is a vague word, are we taking about role rate, sustained turn rate, low speed maneuverability, high speed maneuverability? Looking at an aircraft it is almost impossible to determine its maneuverability, but we know several thing about the pak-fa that should give us an idea of just how maneuverable may be. The pak-fa's widely spaced engines coupled with TVC and widely spaced horizontal wings will insure that the pak-fa will have a very high role rate; likely higher than any other aircraft. Than we have LERX, a large wing areas, high T/W ratio and final fly-by-wire. The designer of the SU-35 were able to maintain at least the same performance of a canard set-up simply by improved fly-by-wire systems and better engines. Generally only Chinese and Pakistani members believe the J-20 is more maneuverable, most neutral parties with relevant aviation knowledge would disagree.
The 117 or the derivative based off of the 117 already has a 15% greater thrust with an additional goal of 10% greater trust. Supercruise is also mostly dependant upon an aircraft's drag and dry thrust.