Yes, Brad, you're right! One has to take advantage of the differences in scale. There two small anecdotes of scale I'd like to share just to show how scale interferes with my collection.
Conte's Harald Hardraada is a very big toy soldier, towering above the rest of Conte's range. The real Hardraada, however, was 6ft6! A giant of a man that had to be taller than the rest of the Vikings, anyway. So anytime some says he's to big compared to the rest of the range, I say: You should complain to his parents!
When Conte released their Barbarians, years ago, I noticed they were about the same height as Conte Romans. Now that won't work for me. The real life Romans were impressed by their enemies height, and I wanted it very clear in my collection. I think I'll buy EOI Romans, who appear to be somewhat shorter than Conte's, and finally get my Barbarians some much needed oposition!
Cheers...
Uthred