But to answer your question, I would agree with shinglejohn in that additions and times etc must be the same in relation to total ibu's. i love making smash ales and my favorite was vienna/simcoe, also munich/northern brewer was great.
id say F the haters and go for it even for the sake of comparison, you will still have 10 gals of great pale ale. maybe try all vienna its freakin awesome.
