Since your question implies that you are looking at token value and not network value, then you should go with Bitcoin.
Almost all organizations/ foundations/ groups/ famous supporters of Bitcoin are involved in promotion and support of Bitcoins financial value. They are all involved because of a Bitcoin and Bitcoin Network is just a feature of a Bitcoin itself. They all are working on a premise that Bitcoin is new currency or new gold or new digital real-estate or new anti-inflation hedge, etc… This way they can sell or borrow against Bitcoins price increase to get dollars.
There is no foundation or organization that is doing anything like that for ADA and probably never will be. Most of Cardano fans are here for Cardano network and ADA is just one of the features of the network. For example, I put dollars into Cardano monthly with a goal to never need any dollars in a future and hopefully to never need to sell or borrow for dollars. If ADA is at $0.01 or $1 or $100 I’m still buying some every month.
There is no need for any technical comparisons if question is just about the tokens and investing, because they ideologically do not represent the same thing.
If you want investment token, then it’s Bitcoin. If you want to be part of new digital economy, then it’s Cardano network.
This is just my view There will of course be others with different views/ opinions/ goals.
I understand that crypto is currently trendy and full of investors and traders. There area a lot of people involved that don’t care much about crypto movement. But just like everything it will go trough price and trend cycles.
Hope this info helps in your decision process