i found a easton EA70 stem ($100 msrp) and a race face prodigy ($41.00) for $34 and $28, respectively. looking at the specs.. the race face is only 4 grams heavier, has a shorter stack height and are available in pretty much the same rise/length. what's the main difference? im trying to figure out why the easton is valued at over double the price. im looking into a new stem for XC, which would you recommend and why?