Originally Posted by
rpenmanparker
They are both fast. The Defy is just more suited to very long rides like centuries and for folks that don't like so much saddle to handlebar drop.
not so much saddle to bar drop equals more upright, equal more frontal wind surface aka slower than a race geometry bike which the TCR is. The perceived effort to ride both bike at over 25mph would be noticeable.
Any bike can do a century, nothing special there it's just a number and marketing tool.