No, I don't believe Christensen is the better option, not when he is repeatedly given opportunities despite his constant mistakes.
And are you explicitly saying Tomori is worse than Christensen?
What is your point exactly? Tomori was given an opportunity back then and he showed his qualities. Sure, he wasn't entirely perfect the whole time but he was playing his first Premier League games. Expecting perfection throughout is silly.
Christensen plays badly but he continues to get selected. Tomori plays well (like against Liverpool, Spurs this season) but doesn't get rewarded.