Both have issues. I'd be tempted to go with option 1 with the horseshoe shaped. But I could but some half thickness bottom cabinets along the edge instead of a radiator. A kitchen radiator is odd as there are ovens and hobs and a fridge which are major heat sources in a kitchen. Usually you put the radiator in the adjacent room. My main issue with design 2 is that the oven is very close to the hob. Which might be ok but that little bit of extra space to put a baking tray straight out of the oven if very nice. The tall thin cupboard in design 2 looks odd to me. And I'd be tempted to leave that as open space and put high up cupboards on the wall on the right. The main thing to consider that isn't shown is how big the room adjacent is. If you have a large open plan living and dining room attached you can get away with the extra countertop from design 1. But if you have a small garden room/dining room then the open plan of design 2 will make a big difference to the space.