Based on the fact that they are both over 6 year pros and ratings have improved little in the past 2 years, It would be very doubtful to see much or any improvement from either.
Since neither of these guys are very good, I'd be cautious with the trade - is someone trying to dump salary on you?
In a platoon, they would probably be OK, but both players are pretty much replaceable.
I'd probably prefer Duran as he's a switch hitter and will be OK defensively at 1b.