I love the over-the-top, uber-destructive power of the Bros. Items, but there's still just something indescribably (classic? Fun?) About Bros. Attacks. Eh... Items for me, though I don't like how PiT was OBSESSED with those things. Seriously, why didn't they just take away your regular attacks?
Oh, and you wanna compare the games? Superstar Saga: One of the best GBA games ever, if not one of the best portable games ever, if not one of the best RPGS ever, if not one of the best games ever. Partners in Time: I want(ed) to love it, but I got to the final boss in, like, two days, tops. And then the final fight takes two-and-a-half hours. But what did you expect? It's a DS game: Kinda fun, but criminally easy and/or short (the drastically unbalanced difficulty later in the game is optional to all developers).
PiT still rocks, though.