Yes, besides the differences you mentioned, there are others:
– the C3500 has fewer fader banks and fewer faders than the S7000 (but you’ve probably already seen that)
– There is no direct access to preamp and filter besides the left screen
– Also, you don’t have three buttons on the right touchscreen to switch widgets.
– And there are fewer softkeys.
This makes it necessary to change the usual way of working a bit. But this is nothing dramatic, you can get used to it quickly.
The signal processing is the same, there are no differences. So you can use your previous showfiles – and you just have to adapt them to the new interface and the changed inputs.