There are definitely several pistols in the SP01 series right now:
Basic CZ SP01
http://cz-usa.com/products/view/cz-75-sp-01/
These will look like all the full length dust cover shadows in the series. Externally, the only difference you will notice is a standard blackened front and rear sight. Internally, it has the firing pin block and the standard springs.
FWIW the SP-01 frame is slightly different than the SP=01 Shadow. The undercut at the trigger guard and the beavertail are not as deep on the SP-01.
Take Care
Bob
CZ75 SP01 Tactical
http://www.czub.cz/en/catalog/79-pistols-cz/PST/CZ_75_SP-01_TACTICAL.aspx
Same as above with decocker
CZ75 SP01 Phantom
http://www.czub.cz/en/catalog/79-pistols-cz/PST/CZ_75_SP-01_PHANTOM.aspx
Same as above with polymer frames
CZ75 SP01 Shadow - Basic (Yes.. theres several of them...)
http://www.czub.cz/en/catalog/79-pistols-cz/PST/CZ_75_SP-01_SHADOW.aspx
This is the most basic model of the CZ SP01 Shadow. The Shadow designation means its built for competition in comparison to other pistols in the SP01 series. The competition features with this pistol include competition style Novak black sights, fibre optic front sight, and no firing pin block. The last feature allows for a smoother and possibly lighter trigger pull.
Now onto the Shadowline pistols... This is where it gets complicated...
CZ75 SP01 Shadow Line
http://www.czub.cz/en/catalog/79-pistols-cz/PST/CZ_75_SP-01_SHADOW_LINE.aspx
First up we have the CZ SP01 Shadow Line aka Shadow Line with full length dust cover. The Shadow Line pistols are a new addition to the SP01 series this past year. These pistols are essentially upgraded versions of the basic CZ SP01 Shadow model. Externally, they share the same sights as the regular model with the exception of flush safeties, smaller CZ75 style slide release andShadow Line engraved Aluminium grips. Internally, they come with a stainless steel guide rod, and tuned reduced main and recoil springs for competition shooting. If you can find one, BUY IT!
CZ75 Shadow Line aka CZ Shadow with short dust cover aka CZ Shadow Mate
http://www.czub.cz/en/catalog/79-pistols-cz/PST/CZ_75_SHADOW_LINE.aspx
This pistol shares the same external and internal upgrades as the above Shadow Line pistol. As you will quickly notice, this one does not have a full length dust cover. Some competition shooters prefer this model over the full length dust cover because the lighter front allows them to transition between targets faster.
CZ75 SP01 Shadow - Canadian Edition
From what I've been told, there's actually 3 tiers for the Canadian Edition Pistols. Without going into too much detail, these pistols command a premium price on the market due to its hand fitted barrels, hand fitted frame and slide, tuned trigger, tuned competition hammer.... list goes on. If you really want to find out the differences, do a quick search here find the article where Slavex comments on the difference of each model.