There is a big difference between BM and Intamin, B&M's are tame while Intamins have Big G's (NO B&M has +4.7 G's and as much -g's as Storm Runner )
Well, I would think that 4.6 is rather close to 4.7, and I would believe you couldnt tell the difference. Katun pulls 4.5 - 4.6 twice during its ride, which being inverted usually intensifies the feeling as well. I also believe that Dueling Dragons Fire HAS to pull over 4.5 G's. Ive ridden quite a few coasters now and a wide variety and NO coaster has ever pushed my arms down when they were up---till Dueling Dragons Fire. They didnt push them all the way down, but I could really feel the G's more than any other ride Ive been on. Its probably the most intense beemer in the US, and possibly the world.
Also, the most intense feeling Ive felt on a coaster came from a B&M, Superman:Ultimate Flight - The Pretzel Loop. Till you have something like 3.5 G's pressing on your chest, everything else feels tame in comparison.
But how would it be vague? You only give us 3 real choices with Steel (even though like I said, the SAME designer designs both) and if you bring wood in, thats what, maybe 2 or 3 more? wow, 5 choices, thats too much for me to handle
I love both, but I can point out more bad things with Intamin than I can B&M.
Oh and also, no designer does airtime like CCI did airtime - Smooth and forceful. Go ride Shivering Timbers, give yourself a few inches on your lap bar, and then get back with me