I would get the Dually....
The Dually BEC is 6 volt, while the IPC is only 5.... That means your steering servo would be 25% faster with the Dually.
Besides, it got two profiles, which comes in handy if you later on want to try mod.
Both are high quality.
Schumacher Mi5 - Sanwa MT-4 / RX-462 / KO Propo PDS-2123 - Nosram 5600 X-treme Saddle Pack - LRP SPX Zero/X12 17,5 - Nosram Stealth Touch Evolution - MAAS SPS 9250