Yes pvc's can be weak or strong!!
I used to prefer the thumps but now I'd rather have the weak ones as you can ignore them if you really try!!
I think its something to do where the PVC originates!
If the Tricuspid valve is
open when a PVC happens I think the blood is pushed out more easy!!
And the opposite if the valve is closed!
I think that's how you describe it, I'd check just to make sure!!
Even though pvc's scare me I also find it quite fascinating!!