Hi all I just want to know if its possible to sync Sitecore 8.1 Update-2 items back to Sitecore 8 Update-4. I will be using TDS to sync the items. If it's possible, is there a guide that I can follow? Its gonna my first time using TDS. Thank you!
You can sync items between versions without issue. I have even seen people do upgrades through serialization.
As for a checklist and TDS
TDS 2 Rocks Connector
plugin so that any change you make in the Sitecore Explorer is synced to TDS automatically.