I would disagree with that. The only position that is more difficult in a pro-style offense is quarterback, everything else is actually harder in the option - and even quarterback is more challenging in its own way.
How again is every position other than QB harder to play in the spread than in the pro-style offense?
We ran a Wing-T in high school which is essentially a spread option and it was 10x harder than running the "pro-style" offense we ran the season's before (granted, it was a much less complex system because it was high school). There's a lot of motion and ball fakes which sometimes can be confusing to remember.
That has no absolutely no bearing on the difficulty of executing the play. The execution that I am referring to is based on reading the defense and executing the play itself based on what formation/scheme/coverage/blitz/etc. the defense is running.
This too I would disagree with. Both systems rely heavily on execution, and if run correctly, both systems create one-on-one matchups all over the field.
The spread is known as the "spread" because it literally spreads out the offense and defense over the entire width of the field in order to create 1-on-1 matchups and get offensive players in space.
In essence, every offense's goal is to create 1 on 1 matchups, but the spread offense allows the quarterback to identify 1v1 much quicker than in a pro-style offense.
The hardest part of a pro-style offense for a quarterback is usually play-action, because he has his back turned away from the defense and that would obviously slow down his read. That's why most play-action plays are flood plays so the quarterback only has to read half the field.
I would argue that the hardest part of pro-style offense for a quarterback is recognizing coverages from the get go and accuracy.
Recognizing coverages and accuracy matters more in a pro-style offense because the quarterback needs to know where to go from the snap of the ball because he has less options than he would in a spread offense. Accuracy matters more in the pro-offense for the same reason. The less receivers there are running down field = more defenders in coverage.
I think it's because the spread offense is "fresh". It's just as easy to run a successful pro-style offense, but defenses are more acustomed to seeing Pro-I 40 Iso as opposed to shotgun misdirection runs. It's still assignment football, just different assignments. Instead of reading the quarterback, the safeties might probably key on the wing man or whoever the offense sends in motion. The middle linebacker might read the fullback in a triple option instead of the guards in a pro-style offense.
Obviously, I disagree that the spread offense is just as difficult to run as the pro-style offense.
First of all, the spread offense adds an addition weapon that the defense must account for at all times in the quarterback. This alone can change the entire face of a defense from front to back, especially an inferior defense.
Also, the spread offense puts an increased amount of pressure on the defensive line because defenses typically want to get more speed on the field to cover the increased amount of receiving options all over the field. This could force more defensive backs on the field instead of linebackers.
Not only that, but I'd also argue that the spread option puts more pressure on the safeties as well because they must be involved in run defense, especially on plays where the QB has the option of running.
No matter what though, if you don't have good athletes, and you can't execute, it doesn't matter what system you run. You could have an offense with 15 plays if you can execute effectively.. spread or pro-style or whatever. Just like a defense uses a 4-3 or a 3-4, an offense uses a spread option or a pro-style scheme. It's nothing but preference.
It's obvious that the gap in physical talent between college teams is much wider than in the pros. This is the reason why there are no spread option offenses in the pros and pretty much proves that running the pro-style offense is based more on execution.
The NFL has linebackers with defensive back speed and down linemen with linebacker speed. The drop off in speed from a college safety to a college linebacker is immense. Not so much in the pros.