What the difference between those two formula

Hello,

I want to count how many orders from anthoer table(wihch already join by order id with my main table) which are mared as "Y' for late 30-60 mins.

Those two formula both works(my another table called Airclic)

CALCULATE(count(Airclic[WEBORDERNUM]),filter(Airclic,Airclic[LATE_3060_FLAG]="Y"))

CALCULATE(count(Airclic[WEBORDERNUM]),Airclic[LATE_3060_FLAG]="Y")

what differnece between those two? which one is better?

Thanks