For some, ports are extremely important when it comes to relying on your tablet as a 2-in-1-class notebook. After all, the 2-in-1 form factor appeals to people who want the best of both tablet and notebook worlds. The Surface Pro 3 has a single USB 3.0 port, a Mini DisplayPort and a microSD slot that supports up to 128-GB-capacity cards.
As for the iPad Pro, it has a Lightning connector, a Smart connector and a headphone jack. The port to keep an eye on with the iPad Pro is the Smart connector. Apple said that third-party accessory makers will be able to create their own accessories for the Smart Connector. Accessories maven Logitec is one such manufacturer that says it will be coming out with accessories based on the Smart Connector this November.
The Surface Pro 3 has the clear advantage when it comes to ports. Not only does Surface Pro offer more ports, but it supports adding either a Bluetooth mouse or a USB mouse. No mouse support for a business-class tablet is likely a deal breaker for many.