Saying you like Brotherhood more because it's closer to the Manga, isn't a relevant argument unless you actually like that version more than the original series. But I can see where you were heading with this. For me it is the exact opposite. I have never read the manga, but it seems Brotherhood didn't translate (into an anime) as well as I had hoped, even though it is closer to the original.One Hit Noob said:I think Brotherhood is better mainly because it stayed close to the original manga. The first FMA diverged off the manga and became a little clichè.
Let's compare the two...
Fullmetal Alchemist
+ Has two interesting episodes cut out of Brotherhood **
+ A better and more focused story around the Elric Brothers
- The Homonculus arc never fully fleshed out
** The two episodes being: the alchemist exam and Edward Elric vs. Roy Mustang
Brotherhood
+ Better fleshed out world
+ Introduction of new (and awesome) characters
+ More awesome fight scenes
- Chaotic and fragmented story
- Deus Ex Machina (or as I would like to call it Evangelion complex)
That's all I can recall at the moment.
I like both series, but I still like the original more. The real killer is the chaotic, fragmented story with Deus Ex Machina thrown into the mix.