just play with that surface pro, it is lagy as hell when you want to work with 2 apps simultaneous
ipad pro is a bigger ipad runs ios and has a more productivity accessories and apps...surface is not like this
surface was a cry for micrososft to introduce some hardware on the market, and they couldn't just come with the same old idea of tablets or laptop..so they made a hybrid, because otherwise customers always choose Apple, but with this hybrid they stole some users..
I hear nothing but praise from surface owners. I've used windows 10 on a tablet/touch screen monitor and the fact that it integrates touch options with a mouse is something apple should have done a while ago. It really does work well for touch screens. OS11 perhaps will marry the two. an iPad pro running an optimized OS X for multi touch would be an absolute dream.