Currently using Maxis 98 plan , i just aware hotlink postpaid 60 same Data with maxis 98 plan

may i know any difference ?

Dial 122 and ask

Yes.
Price.

Hotlink slower internet speeds

Maxis themselves proudly admit that

Maxis Custcare and Hotlink Custcare are different teams.
They'll ask you to dial specific for each brand.

i.e. if i use Maxis line to dial 123, will get Maxis team. if i use Hotlink line to dial 123, will get Hotlink team. if to enquire of different brand, will be asked to dial a different number to reach the different team.

Maxis can go for contract phone plans for high end, hotlink can just low end

mean data speed same lo ?