Don’t forget you don’t build an engine just to be a superstar. You do it to address weaknesses in the system, and you can do it to revitalize dead engines.
While the RS4 can certainly handle 500+ whp and wtq without much trouble for the rods, let’s not forget that long term testing may reveal other weaknesses in the engine that make certain kits better fit to do this work than the others. While APR went 10.60 @ 130, I haven’t seen anyone at APR say they recommend doing that to your car. They did this to one of their own I believe.