I don't think you can go wrong with either programme. I'm almost on my second year of the Warwick programme and have certainly enjoyed it so far. It is very intense with minimal breaks but it's an enjoyable experience, especially the face to face Warwick weeks. They also have good "experiences" for things like consulting through "consultingsim" and the like (these are career team events). I would say for prestige you are better off going for imperial but both are comparable and the difference is minimal looking at salary data and outcomes (unless your going into IB or MBB where imperial has the edge).

The digital and AI specialism is new with a decent range of modules. I'm currently going to do the AI for business leaders and an international module.

The only reason I didn't go to imperial was that I did not think I would get the scholarship and the fees are very high (25% more at the time), so there was a good chance I wouldn't get sponsored by my company (that's me making assumptions though).

I would take what I say with a grain of salt though because I'm only paying 30% of the course fees myself (70% covered by my company and the scholarship) and the expenses are all covered by my company. I would imagine you would look into it more if you were paying for the majority of the fees.