10x10 wouldn't have as much strength benefit compared to the other setup. 5x5 followed by 5x10 would be less volume overall, but a higher relative intensity since you're moving more weight for the 5x5 work. So, as with any training plan, your specific goal is a factor in which way to go.
Yep, it's a classic routine for a reason. Or check Thibaudeau's OVT version which is actually incorporates the 5x5 parameters.