Of the 28 Colorado boys who ran both Liberty Bell and Desert Twilight, 27 ran faster at Desert Twilight and one ran the same time. Being three weeks deeper into the season and a very fast course at lower altitude, you would have to concede that Desert Twilight has some advantages, but it is a (Bermuda) grass course and Liberty Bell is about one-third firmly packed trail, two-thirds asphalt, and downhill overall, so the question is still worth asking.
This year, for those 28 boys who ran both meets, Desert Twilight averaged 39 seconds faster. That is very similar to the 37-second time delta for the girls who ran both races, but caution is urged that this number will not remain constant from year to year. Conditions change year to year, but this does give some sort of idea of how the two meets compare.