TH: No, but with a caveat. Messi is the best player to ever kick a football, and as long as he's on the pitch, Miami will fancy themselves to win. However, Suarez certainly makes this team better in a way that Messi perhaps doesn't. These days, Messi isn't much of a goalscorer. He operates best as a setup man, a deadly little playmaker who makes MLS look silly for fun. Miami would be in trouble without him.
Suarez is his perfect complimentary piece. With Messi doing all of the moving, Suarez can do what he does best: stick the ball in the net. Yes, his knees are gone, and yes, he does look a bit thick around the waist, but he's certainly the best finisher in the league, and in some ways still a world class No.9 - even in his late 30s.
Put it this way: Messi makes Inter Miami a very good playoff team, who can certainly make a run to a championship. Suarez, if he stays fit, makes them title favourites.
RT: If there's one player who can even reasonably compare to Messi, it is Suarez. But, realistically, comparing anyone to Messi is never going to be close.
Yes, Suarez is vital and, yes, his goals are often the difference between success and failure for Inter Miami. Messi, though, is in a completely different stratosphere. He dominates games in ways that make everyone around him, including Suarez, almost as unplayable as he is.
Suarez is a key player, and Miami can't win an MLS Cup without him. But Messi is Messi... what more do you need to say?
JS: This is like asking if Rudy Gobert is more important than Anthony Edwards for the Minnesota Timberwolves (for you NBA fans). Hear your reasoning, acknowledge your point, but in the end, you’re wrong.
Leo is the most important part of Miami. He is the glue of the attack and the individualistic creator that essentially connects the midfield to the attack. We’ve seen that in games this year without Messi that not only have Miami struggled, but Suarez has, too. He relies on his longtime friend to feed him passes and play at the same IQ level. Miami aren’t title contenders without Messi - even with Suarez.