Ball pythons love small and tight spaces. they are easily overwhelmed by large enclosures. If you provide a good number of hides and add lots of foliage, the security aspect shouldn't be a ploblem, but just think about the amount of stuff you will have to clean.
Yes, the size isn't much different, but mostly that cage has a lot of height, which will never be used by this ground dwelling snake. So its just wasted space that you still need to heat properly.
Kevin hornby: Do you have multiple snakes in that enclosure?