Hard to say Sturridge was better because he had no longevity. But the idea that it was anything other than injuries that meant he's not around today is ludicrous. It wasn't a single season purple patch, Sturridge was a prolific goalscorer whenever he got a run of games until basically the last season at Liverpool, by which time he was clearly physically cooked. Look at his goals per minutes ratio in the half a season before 13/14 and the seasons after.
And it was a myth peddled on here at the time that Sturridge was some selfish poacher with nothing else to his game, he had genuinely great technique and was capable of bringing others into the game. And he was a big game player, scored tons of crucial goals even in the twilight years under Klopp.
Sturridge was ruined by injuries, not because he wasn't a top-class striker.