FYI the travel mode 'bike' is actually
the one that uses also elevation data that are included in the
graph.
I chose to build the graphs without contraction hierarchies in order to use also the
turn restrictions feature.
There are indeed differences in the web interface of GraphHopper
and how we use its library in the apps (but I don't intervene in
any way at the results).
I recommend to post also that question to GraphHopper
mailing
list for Peter to be aware.