AVS Addicted Member
Join Date: Jan 2002
Location: Washington State
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The two systems are pretty different. No two control systems are programmed the same.
That said, C4 programming is not difficult so assuming your dealer is competent, then they should be able to learn it. The hardware capability side is a bit more iffy in that a regular dealer may know the limitations of that better than they would. If your project is not very complicated then this risk is manageable too.
Ultimately you need to decide in addition to them being nice and responsive, how smart they really are about technical matters. If they are smart, they can figure things out quickly. If they are not, they have high chance of having problems with the new system and even the ones they currently install.