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The most common issue with non-insulated turnouts is having to isolate the frog and power it separately depending on which way the points are thrown. This is because the train wheels will cause a short as they cross a non-isolated frog. A turnout with an insulated frog avoids this problem.
On the other hand, insulated turnouts can sometimes cause stalling problems with short-wheelbase locos or older locos that have only one power pick-up truck as the frog does not have any power.
As for DCC, the type of turnout is not relevant – either will be fine.