He was referring to the iPad Air, which has the A12 processor, I cannot figure out what exact processor the Yoga has, but the A12 is quite impressive (for a tablet)...Performance wise the yoga wins on the ipad, that is if you compare to the standard ipad which is what the OP did. I pad pro on the other is a difference story each one have their merits. With the yoga and active pen will be ALOT better then the standard ipad, ipad pro about even.
Price/value/hardware/functionality beats the pants off the standard ipad, ipad pro does offer some stiffer competition but it has a few more cons then the yoga.Yoga vs surface/ ipad pro each have their pros and cons and each offer value over the other in certain aspects.
You simple can't compare the standard ipad with the yoga, you need to compare to the ipad pro and then things actually get more interesting and not exactly as clear cut.
Considering the budget, cheapest ipad pro is around R17 000 and still excludes the pen and keyboard, the surface having similar pricing it would be the yoga especially with the active pen, which about as close as you going to get to a surface tablet, and it has a fully fledged windows 10, which means it can pretty much handle any thing the OP can throw at it workwise.
With pricing in mind, weight is really a none issue, sure it's double the weight of the ipad pro, but hardly a uncomfortable weight at around 1.4Kg is hardly problematic.
Considering the price comparison you have to start looking at what the two device can and can not do.Having apple this dongle and apple this dongle especially with the ipad pro, already pisses me off and send apple a f you and move along.
The weight is about 3 times as much. It would really bother me, but I am not the OP.
I have not used the active pen, so I cannot really weigh in on that.
I do agree that they are completely different devices with different use-cases. The Yoga can replace a laptop and be a tablet. The IPad is a tablet only.
I am not saying the Apple is the right answer, I just like to to take the opposing view. (And I really don't like Windows on a tablet)