Jeff,
The pulse rise time at the scope input gets (with such a fast generator) determined by the effective RC at the scope input. Without terminator that will be 1 ns, with terminator 0.5 ns. That corresponds to rise time 2.2 ns and 1.1 ns. Even if the scope were perfect you couldn't notice this at 0.05 us/div. It (and the difference) would be seen at 10X magnified sweep. But the rise time of the 50 MHz scope is about 6.5 ns and will be increased to about 6.86 ns and 6.59. I doubt you can see the difference at all even at 10X magnified sweep.
Albert
