Completely agree
Band of Brothers is based upon a historian's, a popular historian, take on the company. I haven't read BoB, but I assume it has a lot of facts mixed in with some clever story telling and funny/meaningful anecdotes. The Pacific is based upon autobiographies, and I think the tone is derived from the fact that these stories are a soldier's interpretations of his actions after years of festering and deep analysis. BoB's dialogue felt more natural and the story was better paced whereas I felt like the Pacific was more nuanced, and the conversations pertained to each soldier having an existential crisis in the face of the brutality of war. In BoB, you see war weariness, but its mainly characters losing the life in their eyes, or Webster yelling at the German PoWs; its more subtle and more believable. I think I got caught up in the characters of the Pacific having these real, troubling discussions about the war they were fighting. They felt like characters who had much more time to reflect on the war they were fighting, and much more time to deal with the struggles they were having killing other humans and being turned into trained, ruthless killers.
You do get that aspect of individual soldiers reflecting upon their actions years later in BoB, but it is more meaningful because it involves actual interviews with the soldiers who fought in the battles you are about to see being depicted. Some of those interviews are really chilling (ie, Donald Malarkey, the actual person, crying while retelling the story of his friends dying saying "and you never forget it." That had more impact on me then any scene in all of the Pacific)
I feel that BoB needs a second viewing, at least. The soldiers they focused on; mainly Winters, Nixon, Lipton, and Spiers, among others I can't really remember, were really distinct characters on first viewing. Others, like Percontie, Bull, Toye, and Bill Guarnere were kind of distinct as well because of their physical characteristics (literally, Bull being fat, and the others being significantly shorter) or strong character development. A lot of the others just got lost in the shuffle. Characters like Webster and Roye were relatively indistinguishable without the episodes that focused almost exclusively on their situation. Even a strong character like Malarkey, who I really connected with and felt sympathy for upon further viewings; his story kind of got lost when I first saw the series.
On first viewing, although it is great, it is tough to feel an emotional attachment to an entire company of soldiers when you can't tell them apart. Plus, some of the battle scenes are so faat paced and so chaotic that you don't see the full ramifications of any action without a more detailed, further viewing. I watched it at first when I was much younger and I felt like I missed a lot of what made the series great. Upon second, and third, and forth, etc, viewings, I have a much greater appreciation for it as a whole, and for each (well, maybe not each, but a lot of different soldiers) character's unique development