Originally Posted by Shawn Hargreaves
It does make some difference, but pretty subtle. What variety you choose for bittering is nowhere near as important as for flavor/aroma additions.
not true. try using sorachi ace or something that is very flavorful for only your 60 minute addition. it will affect the beer.
60 minute additions do not add only bitterness, they add flavor as well.
if you use two different hops, you will get two different flavors. for instance, very soft hops like saaz will not even create as much bitterness as a high-alpha american variety. you actually would have to add more to get the same percieved bitterness, even though the IBUs are the same. and then it would still have a different flavor.
EDIT: super styrian will be great for bittering a belgian. it's rather smooth for a high-alpha hop.