Brain Age has 100 Hard puzzles, and BA2 has less than that. Fun fact: Hitting rocket times on Intermediate is harder than on Hard for me. One BA2 Hard puzzle collapsed under my number-scribbling assault in exactly 7 minutes, which is damn close to the Intermediate time.
Your main criteria for selecting a Sudoku game is "are they perfect Sudoku", that is, can you do them without requiring you to guess. Because that just destroys the whole point of Sudoku. If there's one with a backdrop of pretty girls, let me know, because I'd love a good Sudoku :D --- ~Uiru
I've got Brain Age Express off the e-shope and never regretted it. But I would buy more than one if you're a serious sudoku guy because I don't care about sudoku and still beat all the puzzles in my smart phone/quick gaming free time.
To a kid lookin' up to me, life ain't nothin' but pixels and money. http://backloggery.com/shampoowarrior