Re: Larue PredatAR 7.62! Any experience or opinions?
The barrel profile, rail cant, trigger (Geissele SSA in OBR and S2S in PredatAR), and adjustable gas block are the main differences.
The cant would not be a show stopper for me as you can get a variety of mounts with cant built in. The S2S trigger supposedly feels very much like an SSA trigger and I haven't heard of folks complaining about it, and it would also be easy to replace.
The thinner barrel profile should be just as accurate as the heavier OBR profile until both barrels heat up. That is where I would expect the OBR to have an advantage as the lighter barrel would be more likely to have a POI shift when hot or with a suppressor hanging off of it.
The adjustable gas block is nice to have when using a suppressor, but if you won't be shooting with a can, it really won't matter.
So I would base my decision on whether you plan to be doing extended strings of fire from the bench and if you going to be using a suppressor.