Coming from a series of various Macbooks (Pro and Air) over the years, this machine is simply amazing. Currently, I own this one as well as an M2 MBA. However, I want to highlight some comments regarding differences that you may notice compared to other models.

1. It doesn't reach the high temperatures that a 16-inch Pro reaches. However, it does reach higher temperatures than an M series Air.
2. It is noticeably lighter than a 16-inch Pro, but it is also noticeably bulkier and heavier than an M series Air.
3. Immediately, one can perceive that its battery lasts less than an M Series Air due to its increased computing power and the presence of fans (M Series Air models do not have fans).
4. The new batch of MBPs brings them with the keyboard area in the same color as the keys. On one hand, it makes it more aesthetically pleasing, but on the other hand, it somewhat reduces productivity as the brain more easily processes a button when it is surrounded by a different color.
5. The colors, compared to the M2, have somewhat lightened. Specifically, the silver of the M3 MBP appears whiter than that of the M2 MBA.

I don't think I need to comment or praise its computing capabilities or the speed of the disk in terms of Read & Write. You can find that information in any online review, which I assume you have already looked at before considering the purchase.