It’s not often that companies list IS/ZS/EC when listing the headset type on their spec sheets. If the information isn’t readily available online you will need to remove your fork and take a look at what you have.
IS Headsets: These IS headsets are defined by having the bearing seat that the headset bearing rests on being built into the frame as one piece. This can be found in both Aluminum and Carbon frames. Compatible versions of the IS headsets include IS41/IS52 and IS42/IS52 To tell the difference between an IS42 and an IS41, you can measure the OD of the bearing itself. An IS41 would have a 41.0mm OD and the IS42 would have a 41.8mm OD.
ZS/EC Headsets: These headsets are defined by having a separate bearing cup that is added to the frame to support the headset bearing. ZS (meaning Zero Stack) bearing cups will be press fit into the frame with the bearing inside the frame. EC (External Cups) will be press fit into the frame but house thebearing outside of the frame in an external cup.
If you still aren't sure what headset your bike is, contact the frame manufacture or your local bike shop