So after the small discussion with
@tamsen_ikard , I took a deeper look into the dimensions of the J-35 based on some images I was able to find online. I landed on some pretty interesting and unexpected findings. (Assumed length of J-35 is 17.3m).
1. The Fuselage lengths (Radome to tip of nozzle) of the J-35 and F-22, have about 40cm difference give or take a few cm.
2. The J-35 wing sweep angle is higher than the F-35C, and is almost identical to that of the F-22. It even has a similar leading edge.
3. The J-35 wings are tiny at about 54m^2 wing area and the span around 11.8-12m.
4. The F-35A and B have a leading edge, but the C does not. Not sure what to make of that.
5. The weapon bays of the F-35 and J-35 are almost identical in length and are both larger than the F-22 weapon bay.
6. The J-35 stabilizer surface area is about 1m smaller than the F-35C.
7. The aspect ratio of the J-35 is is smaller than the F-35C, but larger than the F-22.
The high sweep angle and small wing span of the J-35, coupled with its highly streamlined body, may very well mean that it can go much faster than the estimates I was able to find. If the WS-19 ends up being as powerful as the F119, the J-35 will turn out to be an absolute beast.