Madone 5.2 2006 components compatibility with Madone 5.2 2010

[Gixxerman]

I have a Trek Madone 5.2 2006 which has the upgraded Dura-ace group set on it in place of the standard Ultegra fitment.
I was thinking of upgrading to a newer version of the same model as I like the look of the newer bike (especially the internal cabling) and the new frame is better.
I have spotted a Madone 5.2 2010 locally at a good price. This obviously comes with standard Ultergra groupset.
Both bikes are have double chain rings and are 10 speed cassettes.
I would like to retain my Dura-ace groupset as it is in very good condition.
So my plan was to swap the groupsets between the 2 frames, so the 2010 will have the Dura-ace on it and the 2006 will have the Ultegra on it. I will then sell the 2006 bike.
Are there any potential issue that I should be aware of?
Is it worth changing / possible to change over the bottom brackets too? I think the 2010 model has a different style of BB compared to the 2006 model but I'm not sure.
When changing over the brifters, I will obviously have to remove the bar tape. Can this be reused and put back on again?

 

[Pumpkin the robot]

The BB may be different (HT2 and octalink?) But the threads should be the same so you should be able to swap them. Bar tape is so cheap it is probably better to change it rather than reuse it, it also makes the bike look like new.