Sorry for the delay! I'll try to answer all the questions in this post. Thanks to those that answered some of these questions too!
Here is a link to all our HTC Rezound accessories:
seidioonline.com
The SURFACE is our thinnest case line. It's made of a durable plastic finished with our signature soft-touch coating. Cut-outs for the ports and controls make everything accessible!
The SURFACE Combo is our case along with our a spring-clip holster that accommodates the SURFACE case.
The ACTIVE is slightly thicker than the SURFACE with a inner shock absorbing layer and a hard exterior skeleton, like RottnJP described! The power button and volume controls are covered but everything else is open for easy access.
We'll have a slim extended battery for the Rezound and that will work with our current cases. Unfortunately, we won't have any inductive charging solutions or cases that work with them. I will pass along your request for one.
We don't have plans for a Spring-Clip Holster for a non-cased HTC Rezound, but I will pass along your request as well!