Yes, That is a good point because the overall dimensions of a 453 are larger.
Yet there still may be the chance that they could fit or clear, but there may be a difference with the actual mounting tracks.
Thank You lebikerboy
I'm wanting a 2016 or 2017 real bad and still keep my 450, but the pricing of the 453s are still high. Although still not even close to what I paid for my new 2005 450 I purchased in the Spring of 2006. Looking back, I was crazy. Yet I love my car and it is still the most money I have ever spent on any initial auto purchase. I'm still personalizing it to this day.