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Thats a good question, they have more weight on the front because of their position and usually the base bar should be low enough to be comparable to drops but I've seen some of them sit very upright so that doesn't help. Road looks a bit rough at times to be honest so maybe they have do dodge cracks 
In the end it all comes down to leaning the bike and yourself, I have friends who ride tt bikes and they handle them the same as their road bikes