Again you make a serious point worth consideration.
I do think both dates are very historically significant but I can't rate the importance of one vs. the other.
Consider this.
If Trump had lost in 2000, conceded the loss, and participated in the normal peaceful transfer of power, without the leadup and events of January 6th, his reelection to a second term would be notable as great political comeback for sure, but nothing like the severity of his significantly successful washing away of January 6th.