DarrenOwens says:
I have been itching to play 2nd edition for a while, but am not familiar with differences between 1st and 2nd editions WFRP. I do not own 1st edition rulebook, so can someone tell me more about differences between editions?
This link has the answers
http://www.enworld.org/forum/showthread.php?315619-Warhammer-FP-Rule-differences-between-1st-and-2nd-edition
but essentially characters advance stats 5% instead of 10% when levelling and the magic system changed.
As mentioned in the threads though, Warhammer is more about setting and less about mechanics and for my money, The Enemy Within is one of the best campaigns I've run (and I own it all, even the incredibly rare Empire in Flames.)