It's the IP5 that doesn't have the LANC. The IP55 is a more squat TRV-style camera. It doesn't say it on the Sony website, but it is on the camera. I checked out the camera at Fry's today, but they had a power outage and couldn't power their cameras for me.
Head to sony.com, search ip55 and you'll see some of the specs.
It has been a long time! I do believe I should get out and travel again. Soon!