Doors from 2000 feel lighter than 1996

[Monday]

When I was at the wrecker pulling my 'new' s197 seats, I noticed the doors on a close by 2000 really felt lighter than my doors (1996). My questions are; One. Are there weight differences? Two. Will 2000 bolt on a '96? Three. Were they made of different steel? maybe aluminium?

Thank you

 

[Mustang5L5]

The 99-04 body style is completely different sheet metal from the 94-98 cars. They won’t work.