The features are essentially the same (fixed line 6 + VOIP accounts). I use it seamlessly with OVH, Poivy, SIP Discount Messagenet.
In terms of improvements, C530IP is much faster and more responsive than the C470IP.
Its screen is also better.
It is quasiement perfect for one small detail. If, like me, you use a headset, you can not leave it connected to the handset when you ask him about his charging base: the connector is just 2 mm too low (see photo attached) ... is what I call a beautiful design error! That is why I take a star ...
Otherwise, I highly recommend it.
