Let's check out what's new with Raspberry Pi4 Model-B. The raspberry Pi4 comes with upgraded RAM and high performance CPU Core. Along with the major modification is addition of two dual display Micro-HDMI Ports and Typc-C USB Connector to Power-up Raspberry Pi4. The good thing is even with all changes. Raspberry Pi4 is backward compatible with all previous versions of Raspberry Pi3 Models(B/B+).
Following the list of Changes
1. Two Micro-HDMI Connector (for display)
2. USB Type-C Connector (for powering)
3. 2xUSB 2.0 and 2xUSB3.0 Connectors (for additional devices)
4. The Position of LAN Connector is Changed
The previous Case for Raspberry Pi3 Model B/B+ will not work with Raspberry Pi4 Model B.