I am not a fan of the poppinf senstaion I get from most beads. I love dildo or smooth probes with light or gradual bulbs so my partner can use it in a harnless to stroke me.
Both are different pleasures. That's a difficult one to answer. I'd suggest more experimenting. Might I suggest the Power Balls for such an experiment.
I like a dildo better for anal play. Unless they are really large, beads (to me) are more of a beginner's toy; a good way to test drive some anal exploration.