Hi,
Here is a link to the service manual for a Lenovo Y50-70, both touch and non-touch models.
As it shows different part numbers for the hinges between the non touch and touch version you would have to assume that they are different.
Again with the back cover for the screen, they also have different part numbers for the touch and non touch models.
Scroll to p.92-95 to see an exploded view of the relevant components and their part numbers.
https://download.lenovo.com/consumer/mobiles_pub/lenovo_y40_50_series_hmm.pdf
Hopefully this is of some help.