There are a few main differences between the Cosmo JrTrack 5 Kids Smartwatch and the Gabb Watch 3e. These include:
911 Calling: Cosmo's JrTrack 5 is equipped with emergency calling capabilities, which the Gabb Watch 3e does not have.
Texting: Both the Gabb Watch 3e and JrTrack 5 include a keyboard for sending SMS. However, only JrTrack allows you send photos & videos to and from the watch. Also, JrTrack lets you see their text conversations with other contacts, while Gabb does not.
International Coverage: JrTrack 5 provides coverage across the US, Canada and Mexico. Gabb Watch 3e only operates within the US.
Protection: JrTrack 5's Cosmo Care protection plan is 40% less expensive than Gabb's protection plan. Cosmo care also covers theft and loss, while Gabb's does not. Finally, Cosmo care gets you a free replacement device, where Gabb charges $40 for a replacement. If your kids aren't covered in bubble wrap, Cosmo is probably the better call.