Most of the price difference goes to the interior/exterior aesthetics and the massaging front seats. They will ride about the same, the platty will be slightly quieter due to noise cancelation, but the expy is already quiet except for bad roads and weather really.
I do wish when I had gotten mine I got a platty mainly because the ccd(which is on 302 ltd) but also because my wife liked the massage feature and we actually needed it due to us getting in an accident with it then having to drive 27 hrs with minor back issues. However, looking back, I would've been content with the ltd 302 as well.
As far as the HD tow pkg, many members on here are staunch supporters of the pkg as it adds many features to increase the life of the drivetrain, not just for better towing. If your not towing anything over 5k lbs regularly, it may not be worth the wait or effort to find a loaded expy with the HD tow as they are actually pretty rare to find with a good deal.