welcome to the forum! 
you ideally want to hear from people who have used both and can compare - i have not, sorry
i have never used Exness and wouldnât
regarding IC, they are a âtricksyâ brokerage who run multiple different companies and most of the accounts people open with them are not properly regulated (they claim on their website to be regulated by ASIC but if you donât live in Australia yourself and open an account with them, your account will not be ASIC-regulated, and that matters very much!)
the issue that eclipses everything else in importance, before you send money to a counterparty market-maker âbrokerâ is where and by whom your account is regulated
this thread, this thread and this thread may possibly help you