Both are good pistols, but I like the 6906 better because it offers better ergonomic handling for me besides having Novak sights (which I like better). The 469/669 grip felt a little boxy to me.

Also, one thing that I like the 6906 (and 3rd Gen pistols in general) is that shooting DA, it is one long smooth pull instead of the two-stage pull that 2nd Gen pistols have.

I got my 6906 at a really good price (less than $300) that included two mags and Novak Night Sights.

Good luck in your search, either one is fine.