Hakari at best scales to around Massively Hypersonic thanks to reacting to Kashimo's lightning, while Jotaro has reacted to TW who scales directly to SP who is stated the most powerful stand and is faster than Silver Chariot. Jotaro and SP should have the speed advantage, but it is noted that Hakari does get faster over time while in Jackpot due to his infinite CE reserves, able to continually amplifying his stats.
For strength, generally Hakari should be stronger with small town scaling thanks to Yuta, but overtime it is possible for SP to close the gap due to how fast he is hitting Hakari.
Their trump cards are TS for Jotaro, and Hakari's domain, thankfully both are spammable. I'm not sure how this fight is gonna rule "Domain's negation of CT's against stands" so just going over hakari's advantage from hitting a domain, it is that he has an infinite regeneration and infinite CE pool, for 4 minutes and 11 seconds.
Overall it's a little strange due to stat differentials, however I could see this battle going a long while, but the AP differential might be a little bit more than SP can chew through.