Based on the odds, it seems the Beterviev is going to win it. Not sure how easy it is nevertheless, I don't think any significant advantage for Arthur except on the power and knock department.
It will be an accomplishment if Smith are going to survived and last the full 12 rounds.
But who knows, maybe Smith will have the experienced to dodge that power and give some himself because Beterviev hasn't seen any opponent in Smith's caliber.
Anything can happen inside the ring or in the fight, but I think the odds will surely not going to decide that Beterviev is the favorite one to win here, but in my opinion, I will go with Beterviev aswell, Artut Beterviev is a monster that is why, Joe Smith Jr. can go fight technically with Beterviev but the durability and strength of Artur Beterbiev is surely he legit one here, that is why I had bet on him to win a KO against Joe Smith Jr, this will be another win and another Knockout for Beterbiev no doubt about that,
That is a tough decision because as you said Artur Beterviev has a 100% knockout rate and chances are good that he can continue his streak but Joe Smith vowed in the past few days that he will end Artur's KO streak, so my guess will be same as you, the latter will go fighting while trying to survive Artur's ferocious punches. For now, that will remain a question until the announcer announces who will win the fight later but you might be right and the odds to win by decision are tasty too.
If that's the real goal of Joe Smith Jr, is to just end the Knockout streak of Beterbiev and that is not winning at all, and will surely make boxing fans salty about it, I still think Joe Smith Jr, will get the good stuff out of him and plan on taking the win aswell, by cracking in a lot of points for this fight, I truly don't want to believe that Joe Smith Jr, is just going to aim for the KO streak of Beterbiev, that is not what people kame to watch, they want a real war and they are watching this fight and liked Beterbiev style because he truly aims for the KO, and people like that craft about him, and for Joe Smith Jr, to ruined that legacy he is the true villain here,