Cheers, what makes it different from the original? better production?
Here, I wrote up something to a friend about this actually earlier in the week.
I'm not sure how familiar you are with the FMA franchise. The original anime (called Full Metal Alchemist) starts off following the manga material, but after ~25 episodes or so, breaks away from that in anime "filler". Even before the break off point there's some interjected "filler" episodes.
Now, almost everywhere filler is considered poor quality and worthless. However, FMA is often considered the one exception where the filler is actually quite interesting and enjoyable. Many even consider it better than the original manga author's material. Not everybody though, obviously.
FMAB strictly follows the manga plot. The issue is it retreads the first ~25 episodes of FMA in about ~11 episodes in FMAB (as that was before the break off point, the storyline is the same). This leads to a very rushed pace. It makes sense that'd they didn't want to spend too much time on the same storylines but that alone makes it a questionable decision to START with FMAB when you're new to the series.
The end result are two good, but /different/ shows. FMA vs FMAB is a pretty consistent fanbase war. Definitely best to watch in order. Just realize that the tonalities of the shows are not the same. Generally speaking, the original is more somber, FMAB is more playful.
Personally, I'm a fan of both for different reasons, and I am critical of both for different reasons.
Hope that helps.