Camshaft questions

[KJPG]

Basically I need someone who knows their s**t, I'm starting to build my engine soon and need to know the difference between the 2 most aggressive 2zz cams on the market, Piper & Cat's "stage 3".

Here's the specs:

Cat:

 m http://www.catcams.co.uk/acatalog/Toyot ... ngine.html m  (7100704, bottom one)

Piper:

 m http://www.pipercams.co.uk/pipercams/ww ... VVTLIBP320 m  (VVTLIBP320 Bottom one)

Thanks in advance!