The point of deferring is that you take a higher pension. The calculations have changed recently, but when we did it, you gained 2% for every 5 weeks you deferred (say 10% a year for back-of-fag-packet calculations). You can lso choose to tke it as a lump sum.
This is all on gov.uk, which of course, will be up-to-date.
I found the 'inheritance' rules confusing, but it looked to me as if a spouse would get 3 months' worth (had the pension not, at that point, been taken)
So, you take a gamble! If in good health, with no need to take the income, it is generally agreed that deferring is a good plan, but working out at what point to take it is a bit of a leap!
My fag packet thought that about 68 was a good time to take it for both me & DH, so we did.