The highlights of the new version:
Xstream SD-WAN utilizing the powerful performance of the Xstream Flow Processors in all XGS Series appliances to put IPsec traffic on the FastPath resulting in up to a 5x VPN performance improvement
Performance-Based Link Selection ensures your most important traffic is routed over your best performing WAN connection, based upon latency, jitter, or packet loss
Zero-Impact Transitions between WAN links ensures end-user applications are not impacted by ISP outages or disruption
SD-WAN Orchestration in Sophos Central enables you to quickly and easily setup complex site-to-site VPN overlay networks with just a few clicks
VPN Enhancements make it much easier and more intuitive to manage your site-to-site and remote-access VPN connections including a new AWS VPC import tool
New Search Capabilities allow you to quickly find exactly what you’re looking for, both in the product, and in your networking objects when building rules
Link to the full release notes: https://docs.sophos.com/releasenotes/output/en-us/nsg/sf_190_rn.html