Minato without KCM doesn't have any feats to go by so you can't say for sure. The only impressive chakra feat we've seen him do is teleport the kyubi and a tailed beast bomb but while we know it takes more chakra than the average FTG, we don't know if it take a lot of chakra in general, or just a lot of chakra for him.
If you're one of those people who believe a lack of evidence is proof of fact, then you can say Sasuke>Minato in chakra but it's not a proven fact. Personally I don't see anything wrong with you saying Minato>Sasuke if that's your opinion, but I would assume at the moment that Sasuke has more chakra than Minato without KCM since
1. He's a Uchiha
2. Minato never learned senjutsu despite being Jiraiya's student (which senjutsu can only be learned by someone with a lot of chakra)
Oh and also remember there's a difference between chakra and stamina so be careful you're not talking about one and debating the other like so many people do