Steiglitz is easy to hit and is more limited than Bute so Bute would be the safe bet and I would expect Bute to win fairly easily and convincingly. On a further note though Steiglitz lost to Andrade saying he was unwell (which they all say) but Bute could also have a KO loss to Andrade. Steiglitz lost to Berrio but did also have a KO win over Berrio before Bute did. Steiglitz has also beaten undefeated WBO champ Balzsay, undefeated Gutknecht and undefeated Wilaschek who although hasnt any great wins was 22-0. Bute hasnt beaten an undefeated fighter except a fighter who was debuting where as Steiglitz has. Steiglitz went 29-0 whilst Bute is only now 28-0. Just some points
Even Stieglitz knows he will get his ass kicked so that's why he refused to fight Bute twice already.
I'm German and not very high on Bute and yet I'd confidently put loads of monehz on an early Bute knockout. Stieglitz gets credit for being a surprisingly entertaining Euro boxer but he knows only one way of boxing and that's going to war with whoever is put in front of him. Dude's got heart, though.