McKinsey (London) Vs BCG (London)

Hi WSO community

I have been fortunate to receive offers from McKinsey and BCG (London) and wondered what advice there may be on which to accept. My experiences of all firms is very very positive. I have no niche interests industry wise and am excited by the variety and opportunity to take on a generalist role. In terms of future aspirations I am hoping to do an MBA and then either aim to become partner or if my interests and abilities takes me there , C-suite position of a large organisation.

Thanks in advance for the advice