Can I use a BT850/860 in the place of an existing BT800/830?

BT800BT830BT850BT860BT800BT800-02BT800-02-T/RBT800-ST-01-T/RDVK-BT800DVK-BT800-02BT830-SABT830-SA-01BT830-ST-01-T/RBT830-SA-01-T/RDVK-BT830-SABT830-STDVK-BT830-SA-01DVK-BT830-STBT850-STBT850-SABT851DVK-BT860-SADVK-BT860-STBT860-SABT860-ST

Answer

Yes, the following modules share the same pin layout:

BT800 --> BT850
BT830 --> BT860

There are some No Connect (NC) pins on the BT850/860