Difference ETA between open source and graphhopper maps

I have question about time ETA return by https://graphhopper.com/maps/ and Open Source . Some time ago I checked time and distance between two points. When I check today the distance between is the same but time is about few minutes more. What have influence on it? I upgrade to newer version but the ETA stay the same.

What I can do to get the same result to the https://graphhopper.com/maps?