Originally Posted by
LordBlades
If the differences are small then yes, it won't be noticeable, unless they're the kind of knowledgeable guys that can reverse engineer monster stats in 2-3 rounds, but if it's constantly 2x PC HP, 50% of PC damage like in 4E, then it's going to be noticeable pretty soon.
Some ppl prefer ease of use vs internal consistency, and there's nothing bad with that. I personally prefer the feeling that the dudes I'm fighting are 'people like me' and not something else. Not saying they should be built by 100% the same rules but they shouldn't be noticeably different.