Here's my two cents worth.
First I would always check the H2Source online store first, for anything you want to add to your H2.
Second, since it appears you are taking the time to make sure you purchase the right product for your H2 I will tell a few highlights about mine. My tire carrier comes with a step, the hinge is made of 316 grade stainless steel so there is no need for a messy grease fitting, the tire is offset to the passenger side to increase view out of the rear view mirror, I use a heavy duty stainless steel draw latch (2000 lbs)that actually pulls and holds the tire down in place, the latch is concealed behind the tire, the tire only has to be opened 90 degrees to allow the rear door to open. This is beneficial in a parking lot, or if someone parks to close to your side. Last but not least the tire locks in the open position so you don't have to hold the tire open if you are parked on a slant. You can view some pics on the H2Source online store or my website below.
Ok maybe that was five cents worth.
Good luck on making a decision I hope this helped and gave you something to think about.
www.h2-outfitters.com