Am i going to see a significant difference or what.
Without nothing to compare, No!
Between the two, I won't touch Samsung although some might argue with that.
Also I think the sharp looks nicer than the Samsung;reason why I got the Sony XBR and sony has better track record of being reliable.
I almost bought the sharp (92 and up line was my first choce) but 52" was too big for my needs and the dealer don’t have anything in 40" - 46" in stock. If you'll get sharp, check the 85 and up model line.
Hope you'll get more reply so you can compare notes.