Yes, the cables for both are the same length. The main power cable is about 17" in length with the others ranging between 13" and 18" in length.
In the Silentpc.com review of the P180 case, they used a 480w Seasonic and they had an issue with cable length. The issue was not the length of the PSUs cables as much as it was with the placement of the power connectors on the mobo they used for the build. So, if your mobo has the 12v power connector at the top left corner of the mobo (when installed in the case) go with a PSU with longer cables instead.
I have the P-180 myself, and find it's a great case, and the thermal zones do make a difference. Plus I love how sturdy it is.
One recommendation that I'd make is to find a PSU that's modular. The one thing that I've found with the case is that the lower section does not leave a lot of room for extra cables to lie around, nor do you want to have to push them all up to the mobo area. It's not a make-or-break thing, but something worth looking into.