PC Magazine features the following reviews for the new Microsoft Surface Pro 4

Microsoft Surface Pro 4 verses Apple iPad Pro
http://www.pcmag.com/article2/0,2817,2493173,00.asp

FULL REVIEW of Microsoft Surface Pro 4
http://www.pcmag.com/article2/0,2817,2458373,00.asp

When Apple unveiled the iPad Pro, its resemblance to Microsoft’s Surface lineup raised some eyebrows. With Redmond’s Surface Pro 4 now available, we wanted to see how the two devices really compare. Let us count the ways.

While both tablets are indeed similar, comparing the two can seem like—pardon the pun—an apples-to-oranges scenario. For instance, the Microsoft Surface Pro 4 runs a full Windows 10 operating system, while the iPad Pro runs iOS 9. In terms of ports, the Microsoft Surface Pro 4 wins out, as it has a USB 3.0 port, a microSD card reader, and a MiniDisplay port. The iPad Pro only has a proprietary Lightning connector.

In terms of components, the two are very different. The iPad Pro runs Apple’s latest A9X chipset that’s going to make the tablet fast and powerful. At its base configuration, the Microsoft Surface Pro 4 has an Intel Core M chipset, and at its highest configuration, an Intel Core i7 chip. The configuration we reviewed featured a sixth-generation 2.4GHz Intel Core i5-6300U processor with integrated Intel HD Graphics 520, 8GB of memory, and a 256GB solid-state drive (SSD). The Surface Pro 4 has the guts of a laptop, whereas the iPad Pro is still just a tablet, albeit one with the latest, fastest Apple chip.