This intelligence feats shouldn't be judged on planning feat alone because there are many things wrong with this.
First of all though both minato and itachi are genius one was 13 when he formatted his plan whilst the other though we dont know the age when he died, he was significantly older than itachi when he came up with his plan. To put it simple, life experience is what minato had over itachi when he planned naruto's life. Itachi at 21 has gained enough life experience to note that what he did as a kid was wrong. Asuma who isnt hailed as a genius wouldve formatted a better plan than 13 year old itachi because he isnt naive, though not a genius like itachi, he has life experience.
Secondly when itachi has been put in a tight corner by danzo, there was hardly anything to work with. Dying by sasuke's hards at that time seemed the most logical thing for itachi to plan.
Thirdly having a fortune teller help you with your plan always help, something that alot of people seem to forget. Minato's whole plan was based on something that jiraiya told him, and jiraiya got this info by the great toad sage himself.
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^^ That is something people forget. Sure minato showed great intelligence in knowing that he might not be the 'savour' that jiraiya thought he was, but rather he took a gamble, yes that is what it was a gamble into believing that its not him, but rather his son is the savour that jiraiya was talking about and not him, thats when he then proceeded with his actions into sealing the fox's chakra into naruto.
You simply cannot ignore the fact that minato had a massive tip off from jiraiya when he came up with his plan Whether Minato wouldve still went on with his actions without knowing the info jiraiya gave him is very unlikely because all his actions were heavily based on this piece of info he got
To simply base this on planning feats is too vague. Anyway these type of threads are always subjective and opinionated. There is no right or wrong answer