Esc 60a, 120a & 150a

[Veccy]

Hi all

Just got myself back into racing after a four year absence, gosh I cant believe how much as changed through the years, I have a question about speedo's

is there that much difference between the different esc being 60a, 120a & 150a I will be going back to TC 13.5 class & 17.5 class so would a 60a be okay or would I need to get a 120a?

Thanks for your help