I lift more when I am heavier
I am heavier when glycogen loaded
Other than that I notice no difference. My best lifts have all been glycogen depleted with the exception of my most recent bench press
I even did my last meet glycogen depleted. The body works great on the ATP/Creatine cycle. Glycogen is not needed unless you're doing very high reps and even then it's more of a "middle ground" of suckage. For example one time I benched 105kg for 1 rep, benched 80kg for 4 reps, 70kg for 6 reps then 60kg for 20 reps in the same workout. You can see there is good top end strength and good repping strength but this middle ground where I should be able to rep the weight 8-12 times with ease but can not. You can see this happening in this video actually:
You can see in the rep test I am trying to get the reps out as fast as possible, I run out of ATP after a certain amount of time and just "die" because I don't have any glycogen to use. Hope this explains it well