now, we musn't forget that a spacehip is different from a plane. There's no worry about aerodynamic issues, but there's more about temperature. A plane can sustain really warm temperature (the SR71 can fly up to mach 3, and must resist extremely high t°), but nothing in comparison with a space faring vehicle (not atmosphere to stop sun, or extremely cold environment when there's no sun -behind a planet, or, in fact, on the non exposed side of the ship). The US shuttle hull is much more resistant than a plane hull for this main reason, and I bet it could resist some punishment. A spacefighter, free from the aerodynamic issues, will probably have a more resistant hull than its atmospheric counterpart, just because of t°. So, I suppose a space fighter should be much more resistant than an atmospheric fighter.