Good question. They’re similar but slightly different.
Yes the pull-off in 43 you play the first string at the same time as the pull-off.
The pull-off is an 8th note vs. 41 where it’s a 16th note. The 16th note version you pull-off slightly before you pick the first string so you hear the sound of the pull-off a little more.
More importantly though is timing of the right hand picking doesn’t change at all whether you do a 8th note pull-off or a 16th note pull-off. That change is only happening in your left hand.
If you still have questions let me know.
– Mike