Both I use often and both have their own merits and demerits, many other ecosystems or products are built from them, but neither has reached the stage of great success I have observed.
The question is in which way Solana can compete with Bitcoin, this is still far enough to compare Solana with Bitcoin itself
No one is comparing Solana with bitcoins. We are comparing solana with polygon Matic. Although both coins are good one so it is wise to invest in both of the coins to gain maximum benefit.
Also remember, that we should have bitcoin as a major portion of our portfolio.