Coming out much heavier and customizable, Microsoft's Surface Pro 4 is contending against Slimmer, lighter and much more user-friendly Apple's iPad Pro.
Both the tablets are competing for the "Professional" market, and have their own pros and cons over one another. While iPad Pro offers best "on lap" experience, the Surface Pro is certainly for those who wish to work in the office, placing the tablet at a certain typing friendly angle.
The Surface Pro also comes with a clickable touchscreen that's built in, while iPad Pro doesn't come with one. Meanwhile, Apple's iPad Pro is also physically a larger device compared to Surface Pro, not only in terms of screen size.
Apple iPad Pro runs on A9 Chip, with 4GB RAM and 32GB/128GB internal memory while Microsoft's Surface Pro 4 comes with Intel Core M3, Core i5/i7, with 4GB/8GB/16GB variants and 128GB/256GB internal memory.
In the terms of battery, iPad Pro outshines Surface Pro as the Surface Pro's major battery is stored in the keyboard that needs to be attached, and without it, Surface Pro might hardly run for 3-4 hours, while iPad Pro is known to extend for over 9 hours.
Surface Pro's pointer that moves along with the stylus when used is quite an annoying aspect of the device, while Apple's style is much more advanced in terms of technology and precision.
For artists and writers, iPad Pro might be a right choice, but for people going to work, Surface Pro 4 is the best choice.