“NEED CAREER ADVICE”

I received an offer from Capgemini and have already accepted the welcome kit, although I haven’t taken any assets (like the laptop) or provided my details/logged into Outlook yet. Now, I’ve also received an offer from Accenture with a higher package, but the offer lists a location that isn’t my preference and includes some IP details. When I contacted their HR about this, they mentioned that they would only revise the offer letter if I accepted it as is. Meanwhile, Capgemini is urging me to join. Should I send a rejection email to Capgemini and wait for Accenture, or should I put Capgemini on hold ? What if they send my laptop home ? Will Accenture really send revise offer letters ?is it worth sending a reject mail to capgemini and wait for Accenture revised offer letter ?