I did not change my preferences to the pie menu and the behavior of Ctrl+Tab is different than Tab always opening the pie menu.
When you have an armature selected:
Ctrl+Tab switches between Object Mode + Pose Mode while Tab switches in and out of Edit Mode.
Only in Edit Mode the pie menu comes up on Ctrl+Tab.
Not really a question, but it confused me quite a bit at first and I thought I’ll leave the information here for others that did not activate the pie menu on tab option. And honestly I personally find this more convenient than always clicking in the pie menu.