Run the node you want.
BCC will use another TX version as replay protection.
I think Armory can't send coins per default on that chain after the split.
"How is transaction replay being handled between the new and the old blockchain?
Bitcoin Cash transactions use a new flag SIGHASH_FORKID, which is non standard to the legacy blockchain. This prevents Bitcoin Cash transactions from being replayed on the Bitcoin blockchain and vice versa."
https://www.bitcoincash.org/Their transaction replay protection is all opt-in. Transactions on Bitcoin ABC are still in the current transaction format.