The difference between ISOFIX compatibility and NON-ISOFIX compatibility is the method of installation. Please note that ISOFIX installation is only for use in cars with ISOFIX connections. To confirm if your car is ISOFIX compatible, please consult the car’s handbook.
Is it safer to install with the ISOFIX method or the lap sash method? Both methods are equally as safe when installed correctly. Please follow the installation instructions in your child restraint’s instruction manual.