@chloe7800 The first one is definitely better than the second, with a faster processor and graphics chip. And it's about as good a price you can find for that hardware. I did find two other options worth mentioning on Argos (and none on Currys) though. This one has essentially the same hardware as the first one you've linked, so it should run Sims 4 the same. But it has twice the storage, which is convenient if not strictly necessary:
https://www.argos.co.uk/product/1997844?clickPR=plp:34:51
This one has a faster processor, which won't mean much to Sims 4 (the graphics chip will be the limiting factor) but is nice to have, and twice the storage as well. It's also slightly smaller, which may be a good or bad thing depending on your perspective.
https://www.argos.co.uk/product/3343173?clickPR=plp:26:51
All of these should run Sims 4 roughly the same, plus or minus a few percentage points due to how the manufacturers tune each model. So it's totally reasonable to choose based on screen size, or weight, or anything else that matters to you.