OP, the LRHS/LRTS was a superb design by LOW offering outstanding IQ for the package. The LRHS is a "lighter" scope not sure if that is of importance to you but it is also a longer scope. The ERS is a "short" design which works well on gas guns, but if you don't mind the length of the LRHS on your bolt gun I do think it offers slightly better optical performance vs. the ERS but that may be debated. I've had the DMR and DMR II and also the LRTS and LRHS - I still have the LRHS because I love the G2H reticle and the circle of death and at under $800 street price on these I just don't see any other scope competing optically.