The 1050 Ti was the premium discrete GPU option in the XPS 15 in 2018. That only got upgraded to the 1650 last year. Maybe that's as much a ding on Dell as anything else, but either way, lots of us are still rocking those laptops and they're hardly "below entry level".
Nah. I have this laptop too and at the time, the 1050TI was considered underwhelming but "well this laptop isn't for gaming, it's a business laptop". The contemporary Surface Book 2 had a 1060 with almost double the performance and people were kind of pissed.
Comparisson could be against either an MX250/MX350 if they wanted to compare to nvidia (however that's not integrated in a SoC-like manner) or the AMD Vega on Renoir, or Intel Graphics on Ice/Tiger Lake (I honestly lost track of what intel calls their iGPUs these days, they went back and forth between confusing naming conventions, but it's the CPU gen/model that's important anyway).
The memory bandwith, amount of shader units, TMUs, fill rate, etc is different (slower) on the MX350. While they are surely the same archiecture, the MX350 is lower tier than the 1050.
And in this case, it'd make for a larger difference between Apples GPU and the nvidia. But then again, the M1 is a mobile SoC and the 1050 is a desktop GPU. So we shouldn't even be comparing them to being with.