I think the opinions have been well spoken here. I'd personally do the trade : )
Doing the trade would be of a greater financial value in my opinion. However, you have to keep in mind what you are looking to do w/ the bike - ie: resell profit, restore, ride as is, etc... If you want to make it correct w/ original parts you may be looking at a good amount of additional money still needed to invest into it. Just some things to keep in mind.
Both are nice bikes - Good luck!