thoughts on tigersharks 12ft vs racetigers rc 168cm

If you're not racing, then I'd say there are better options for an all mountain ski than either of those.  Although neither of them will be a bad ski if you're staying on piste.  In fact the edge grip is unmatched on the RC.

Sort of out of date topic....but if anybody do search for these skis I like to chip in as an owner of Volkl Tigersharks 10ft WITH Power Switch.

I have to say that these skis are very good IF YOU like me like good and fast edge grip.

I use the Power Switch OFF in all conditions except really hard pack / Ice, so more or less all the time in soft

they are very stable at speed, and I try to carve with GS turns all the time, but they go pretty smooth over to sliding.

IMO the Powerswitch is actually working, it saves my old busted knees and body to be able have longer ski days.

BUT I do not have any experience Backside / Backcountry / Off-Piste 

Hi, I suppose price could be an issue.  I ski the RaceTiger SL, and it is a very nice, stable, quick ski.   Here in NH, the RaceTiger is a popular ski, especially with instructors (at one mountain where I teach, it would be among the top 3 or 4 most popular skis, along with Fischer Progressors, and RX8s). I demo'd the tigershark (powerswitch) when I purchased the RaceTigers, and did not care for it, why? I don't recall, probably because it wasn't as quick as the RT.  Your post doesn't mention where you are located, how you ski and what snow conditions you experience, but if you are looking for an all mountain ski, current offerings with a wider waist might give you more versatility, and might be more forgiving in bumps.  I also ski a Blizzard 8.1, and it offers the versatility over the RaceTiger, but it is not as quick turning or in turn initiation.   

Hope this is helpful.