Pepwave MAX Transit Duo - Separate Antenna Usage


I am new to this forum so I apologize if my question has been addressed elsewhere. I just purchased the Pepwave MAX Transit Duo SD-WAN bonding router. I want to use an aftermarket antenna as I have been told it will give me much better signal strength. I currently own a Weboost Drive OTR Omni antenna but I was thinking of buying a Poynting 7-in-1 MIMO Omnidirectional Antenna. Can anyone help me understand which would be the better option and why? I am listing the spec sheet on both products. Thank you in advance. Weboost Drive OTRPoynting 7-in-1 MIMO Antenna