Well, if you want a bar to squat with that doesn’t bother your shoulders, get a buffalo bar.
If you want a bar to do go mornings, i would get a cambered bar. I like the cambered bar because you can really load up the weight on good mornings with them and still place it low on your back with absolutely no shoulder strain.
The safety squat bar is harder for good mornings because the bar is places higher than a barbell would be placed.
I would say it is actually higher than if you use a manta ray on your neck and squat. Also, this bar is cambered forward which will also make things more difficult. Harder isn’t a bad thing as it will put more emphasis on your quads when you squat and it will work your whole back (upper and lower) on good mornings. If you get this bar, get it with the long handles. I noticed if my elbows are sore, i don’t like using this bar.