OpenWRT and TO are different repos as it currently is since TO modified some packages from the upstream. However there is no list of which packages actually been tailored to TO and thus utilizing packages from the upstream reop, and snapshots even at that, bears some risks and it is not recommended.
The wait for updated packages in the TO repo to appear might be rather long, perhaps until end of this year when TOS 4 is supposed to utilize packages from the upstream repo directly.
There are frequent recommendations for TO user to compile packages from source themselves.