Is there a difference between offline and online?

pu1. Isn't it the same?

2020-05-31

OK

pu2. I compared it before, and there was almost no difference
Off actually saves shipping costs

2020-05-31

OK

pu3. It can be cheap if you eat a lot of coupons online, but there is no difference because coupons are rarely used

2020-05-31

OK

pu4. I think offline is more comfortable. I don't have to wait. There's no price difference

2020-05-31

OK