It will all depend if you prefer the darker loo of the ceramic or the lighter loo of the titanium.
As for the harder case, theorically and practically ye,s the ceramic is harder, but if it falls or if ti receives a big shock, the case must have some severe dammage ( ceramic ) .
Personally, I would go for the titanium, but if you're deeply in love with the look of the ceramic ...
Best,
Nicolas