I would've replied to this if I saw this sooner (I rarely check General Discussions);
But Minnie's Wonderful Christmastime fireworks performed during normal park hours are done without perimeter fireworks.
To make up for this, there's some additional fireworks added to where perimeters would have been used.
I saw the show last night and noticed the slight differences. Hope this kinda helps, even tho it's a tad bit late!!