Which is more secure, using just bcrypt or SRP?
The point of SRP is to remove the need for the SSL/TLS certificates. With SRP integrated into SSL/TLS (as per RFC 5054), you get mutual client/server password-based authentication and can do without any of the dreadful certificate business; and yet the protocol is still resilient to offline dictionary attacks.

If your SSL/TLS still uses a server certificate then there is little point in using SRP; the client already knows that it talks to the right server, and can send the password as cleartext  within the tunnel (or a hash-of-password if you really need that to sleep at night).