This is really difficult to say because universities do consider your GCSE at this stage.. The first one seems to have more potential due to GCSE results but seems that he is unable to adopt to the hardwork in A levels.. I would actually take the second person.
But extra-curricular activities, ambition and enthusiasm plays a large role when applying.
I only achieved 1A,4Bs and 4Cs at GCSE's (did not care at all about education). I thought that it would have a profound impact on me when i apply for universities, but i achieved AAAA at AS level and pretty much all the universities I applied for took me into consideration even though I achieved not so excellent GCSE's.
But you should know, A level results matter more. Especially when you are applying for graduate jobs. Employers only care if you have got GCSE maths and english at C (sometimes B), but to even apply for graduate scheme, a lot of companies require like 300 ucas points minimum from 3 A levels etc