Look most pressed steel rads are mostly the same, just like petrol, the manus try to differentiate their products as always to gain market share and a premium price. Check the output and size so it fits your purpose. Enter the world of designer rads at your peril, my mate sells Italian rubbish , looks ok but its a bit like burning a torch in the dark but he makes a good wedge in Knutsford from the footballers and their wannabees
centralheatking
Having been burnt by installing cheap Screwfix radiators in the past I’d disagree they are all the same. I found they started to corrode within 18 months. There may well be good quality cheap products out there but it’s certainly hit and miss.
The other consideration is performance, Stelrad always seem to come out well in independent tests between what they claim as heat output and what the actually deliver.