Spence is the tougher fight because he's a large Welterweight and a finisher. That isn't the point, however. As I said in the OP in the very first sentence,
the Spence fight hasn't been confirmed yet. The rumors are that they
may be in advanced negotiations. However, Mikey left the door wide open the other day in an interview with ESPN Deportes. Here is what he said of note.
“"We could not close the agreement [with Commey] because obviously there are a lot of big fights on the horizon for me,
obviously people know of my interest in the fight with Errol Spence at welterweight, but there are also fights at 135, 140 and 147 pounds that are very interesting for me and we are trying to specify what is best for us," said Garcia ESPN Deportes.
"We are thinking of fighting in January or February,
everything will depend on the fight they give us but in those months we are back. We are going to look for what's best for us, we want to give them great fights, but it is true that Spence interests us as does Lomachenko, Pacquiao and the best."
”
Mikey Garcia on Dropping IBF: Too Many Big Fights Looming
If he fought Lomachenko as his next significant opponent, which would be on PPV, he'd make good money in a more realistic fight that would be even or close to even on paper. The fight is not only makeable it's also preferred first over the Spence fight according to Mikey's own team (and common sense). Robert has gone on record for a while now stating that Team Lomachenko and Top Rank are already fully on board for Mikey being their
next fight of interest for 2019. It's also an easy fight to make according to Robert, and best of all, it isn't a complete mismatch.
So, it begs the question: Why would Mikey fight Spence first on PPV when he could fight Loma on PPV instead, and assuming he wins, fight Spence next on PPV or a bit later? Two guaranteed PPVs are obviously better than one PPV for a fighter's bank account. He would also stand to make even more money if he fought and beat Loma heading into the Spence fight because he'd have more leverage to negotiate at the table.