I'm gonna have to go with IOS on this one.I'd place Drilbur over Sandile for Top. I've been playing through with a Sandile(and evolutions) as a standard part of my team and I gotta say, I'm fairly disappointed. Its typing and defenses leave it to take heavy damage and is often KO'd. His evolution times are poor as well, and his performances will be lacking often, especially when nearing its next evolution level. On the offensive side, he's a bit disappointing as well, not being able to OHKO certain threats when he should. With that being said, Drilbur should go above Sandile, for earlier access to its final form, better defensive typing, and better offenses.
I gave my Sandile the Eviolite until it evolved into Krookodile and with Moxie it had AMAZING sweeping potential. It literally soloed Cheren for Every Single battle. Not that Cheren is that much of a threat, but still.