For me in Spencer route he did love MC more than Darius when he asked him as I followed best choice for his because when I said I loved him he cried in which adorable, and also in his route Darius mention at bar if Spencer did not picked him he will be all over the MC, so maybe the relationship between Darius and Spencer are already broken even in Harold route Spencer has feeling for him and angry at Darius for setting MC with Harold and played Dozer route he was shocked that MC was gay and did not confess to him before Dozer.