E.g. Laptop, computer hardware, food.
Sometimes yes sometimes no. It always depends on whether or not there's an offer.
You can't say that in general, it also depends on whether you are a Prime customer or whether there are campaign days.
So I always find groceries at Amazon a little more expensive than in the shop, but if you want to have the very special chocolate, as a gift or something, you will find what you are looking for and do not have to hollow the 0815 chocolate box from ALDI.
In terms of technology, I would always compare, the big chains all want to undercut themselves, but what I can say is that I often got used devices from Amazon that were refurbished and they were very cheap and always worked well for a long time not so and I had my money back in my account very quickly, the dialogue with Amazon was easy and good.
Where I'm always convinced is the Prime offer, films, books and music, I find that it pays off more than Netflix a year
Since Amazon is not a special shipping company for computer hardware, it is not necessarily cheap there. I always buy PC hardware and software from specialists (e.g. Mindfactory). It is cheaper there because they simply sell more of it and the selection is much larger.
I would never buy groceries of any kind on Amazon, but only regionally. At least I know that it is fresh and that it has not been driven halfway around the world and that it has produced tons of CO².