SC10 4x4 is highly durable. you will not destroy it on a 1/8 track.

Having had the SC10 4x4 and ran in in conditions from low traction 1/8 tracks to indoor tight carpet, I'd say probably the biggest factor in my opinion would be how are the jumps at the tracks you are looking at.

I think, well, at least in my opinion the aftermarket has options out there to lock in the rear end (M2C toe block) and send power where needed (RC Shox Center Diff to name one). You also have the rough track part covered by using 2 stage pistons like RC Shox ones. However, the big thing is that its big jump in -air characteristics can feel inconsistent. Also, with the stock shocks in comparison to other competitors may not give you the plush ride you may need.

But, if you like the truck, go for it outdoors and see what you think. Heck, with the prices for these being so cheap now you may be happier actually using it than what you would get for it. Part of me is toying with the idea of picking one up for my daughter who has some interest. Even though it would be technically in the same class as a vehicle I already have (figure if they don't like it, would have a vehicle in another class I could run which is why leaning towards sc10b), its cheap enough and durable enough that it could be worth a shot.

What you are thinking though, indoor versus outdoor "trucks" was actually mentioned to me by an AE rep as a general idea being thrown out there when we discussed an RC8 based 1/10 SCT. (And NO, the SC8 is NOT that.)