Shalane - born in Colorado but raised in Marblehead Massachusetts.
Deena - born in Waltham, Massachusetts but raised in Agoura, California
(meanwhile Salazar was born in Cuba but raised in Wayland, Massachusetts).
Kind of a fun coincidence.
I think Deena overall had the more "successful" career but I think had they raced each other in their primes, Shalane was a better runner. When they competed in that XC race, Deena was at her absolute peak and I think Shalane was still on the rise.
Also, the marathons are difficult to judge. Shalane's win in New York was, to me harder fought than Deena in London or Chicago (where pacers lead you through the first 30K). But Deena also battled for bronze in Athens 04 in a race that must have been the definition of suffering. And, a sub-220 is spectacular and the best hope anyone breaks that in the near future is with Jordan Hasay, who similar to Ritz, is a phenom when in shape and healthy, but is rarely both of those things.