I cannot be sure if the training is slower or faster. Too much testing involved. However what I can tell you from switching back and forth with a full team of fast trainers is this.

On the PC with the player set to max train it takes YOU less time to train them. That doesn't mean you are getting more training for your green pack but that it is just faster to do.

Secondly it does appear that injuries increase on max PC vs Android/Iphone app. I think the phone has it set to medium intensity at all times but I can't officially confirm that.