There's a little wiggle room in loop value I think due to getting shots off of combos being worth more coins. It's not extremely significant, though.
I had a game recently where I scored 262M in Rats, then triple-drained out of a multiball. I had 20 seconds left on the timer as well. Even worse since I drained out I didn't get my super spinner, which I'm assuming would've been worth something talking about after 262M in mode points.
I also wonder if crank it up spinner and bumpers actually do anything during those modes (rats and saddle I think it is - the purple one).