I want to use them on 3T Mistral handlebars with probably (not decided yet) Tektro calipers.

Are the two Shimano ones like DA and Ultegra spec?
How would the 3T ones compare in quality to either of the Shimano ones?

http://www.probikekit.com/display.php?code=D0046

Shimano BL-TT79 Dura-Ace 7900 TT/Tri Aero Brake Lever
RRP (UK) A$146.47
Reduced By 10%
Now Only A$131.82!!


http://www.probikekit.com/display.php?code=D0016

Shimano Dura-Ace BL-TT78 Extension Brake Levers
RRP (UK) A$93.19
Reduced by 10%
Now Only A$83.88!!

http://www.probikekit.com/display.php?code=X0366

The New 3T TT/Tri Aero Cycling Brake Levers
RRP (UK) A$67.99
Reduced By 10%
Now Only A$61.20!!