I personally would recommend that if you are stuck in the middle find a golf shop nearby with a real driving range and spend $20 worth of balls to get a feel, the closest one to me is 20 miles but it made my decision instant on my latest driver.
If there Isn't a golf shop with a real range (or Full return Policy) then it would be a good idea to put things (swing speed, height, handicap, etc.) on here so someone can give you a more detailed description.
personal opinion:
Burners if you are looking for more distance, they are LONG clubs (owned a set a while back haven't hit anything that long to date.)
if you drive the ball a long ways and get within an 8, 9, PW, on most par 4s then i would reccomend the burners as well since the X20s are known to be sort of bulky on the topline.
Forgivness: X20's for sure, they are about as straight as you are going to find with a very high trajectory and decent amount of spin.
the most important thing, GET FITTED. as long as you are properly fitted for your clubs then im sure you will be happy with either set.