I don't think it makes any real difference. If anything, these additions to the Bruckheimer films aren't usually by the director, so I can't help wondering, why were they cut? Enemy of the State is a long favourite of mine and I got that extended version. There was no point. I read up on Crimson Tide extended and saw loads of comments that said it also made no improvement. I couldn't be bothered to upgrade Con Air.
Which is why you should get it. Right now. Then watch it and assure me I was right!