OGSR vs OGSE 2.10 R (S.T.A.L.K.E.R.: Shadow of Chernobyl)

In the recently held OGSR noticed that there are some quests, like in the OGS 2.10 R, for example, when Sidorovich asked to take a box to the warriors. since the OGS 2.10 R I completely failed, unlike OGSR, and in view of this findings, there was a question, it is necessary to place the OGS 2.10 R ? They strongly differ on a quest ?