Which convertible Car Seat is better. the First Years True Fit or the Radian Sunshine 65.?

I'm trying to decide which convertible car seat would be best for my son. I know they both have a forward facing weight limit of 65 lbs which is the highest i've been able to find. From what I can tell, they seem to be pretty evenly matched. Anyone who has experience with one or both of these car seats please give me your opinion thank you.