One thing, although far from ideal, you can do in either
Streets and Trips 2010 Autoroute 2010 is to create a route in the usual fashion and then trace over it with the Highlighter tool, select a unique color for that particular route, clear the route, create a new route, trace over that, color, etc. until all routes are done. This will show various routes on the map and the distances of each.
The obvious deficiency of this approach is that you only have these Highlight traces on the map; you do not have driving directions, stops, or other route data for anything except the last-computed route.