you know what,i really don't know what would make a better mother,i've never kept one,i'm guessing advantages of the flowering clone may include a shorter plant so more light penetration,and for a mother you'd put it in veg so you'd be using clones from a vegging mother so'd have vegging clones hence normal plants,and you'd have more clones due to the excessive branching,but like i say,i'm guessing,just pointing out it can be done during flower,guess it could be worth trying both ways and see what your preference is