Og Xbox is on sata 2, Xb1s has a sata 3 HDD but the interface itself is still sata 2 which means that you still couldn't hit full speed on an internal SSD. That's aside from the fact that the hard drive on the Xbox is not designed to be replaced to begin with and your warranty is voided if you do, and that the xb1s still comes with a 5400RPM HDD. The only viable way to improve your load times with an SSD on Xbox is using an external hard drive through the UsB3.0 port, but unless you can install the xb OS on an external drive and boot from that, it won't affect the speed of the UI itself what so ever. Also, where has Microsoft ever said that their upscaler is hardware based and not software based? 

Anyway, if you REALLY want to generalize things and ignore the smaller things like PlayGo or Backward Compatibility, then sure, the difference between the pro and the xb1s is about 300% and a 4K disc drive.

I'm surprised Forza Horizon 3 sold more copies at retail than Forza Horizon 2 during the first week. FH3 comes with the Windows version as a bonus if you purchase it digitally. It's an awesome game, but a digital purchase is a must for first-party Microsoft titles these days. Glad to see that franchise growing in strength, I only recently discovered how awesome it is. It's the true successor to PGR, and can be made either very arcadey or impressively SIM-like. It's nearly perfect IMO, and has tonnes of stuff to do.

So, they shifted places and numbers from last year.

Pro runs all supported games at native 2k to 1800p and some at native 4K. No game on either PS4 and Pro runs at native 720p, they are not Xbox One.

Clearly you know very little about Pro.

What about Project Cars and Need For Speed. Did they released the number of sales per plataform ?

Lol, Amazon's thread doesn't say that.  But Even if the Xbox One wins October,  you need a lot of confidence for saying that it will be  by 2 times when it  was unableto surpass it by 2 times even with the Xbox One S's lanch and 3 months worth of Pre-orders

Project Cars sold ~60k on Ps4, XB1 and Pc combined (3 weeks)
Need for Speed 2015 sold < 390k on Ps4 and XB1 combined (4 weeks)

Forza Horion 3 is basically the second best selling racing game of this gen just behind Mario Kart 8.
And these are just retail numbers. Forza Horizon 3 on PC is digital only. Plus the digital attachrate for console games is getting bigger every year

Great charts as always Shadow. Its interesting that the PS2 and Xbox has stayed above the PS4 and Xbox One for this long. Also I'm shocked that the gap grew by such small numbers between the 6th and 8th gen this month considering all the price cuts deals, and the Slims. I don't think think gen 8 will be able to close the gap with gen 6 this holiday but with the Pro coming but it should put the lead down to lower than a million unless the third year your using is 2004(Halo 2) then I doubt it but if you're using 2003 as then I could see it happening.

Oh! Nice one for Mario Kart 8! 

This also opens up the possibility of triple-layer BD-ROM discs with much more capacity.  And UHD discs offer much greater image quality than watching House of Cards on Netflix.  That matters to some people, and I don't see what is gained by dering them.