Which is better Solana or Avalanche?

Ah, quite a debate indeed! Could you please elaborate on the comparison between Solana and Avalanche? I'm curious to know which platform offers better scalability and transaction speeds. Also, could you discuss their respective ecosystems and the range of applications they support? Additionally, I'm interested in understanding their security measures and how they handle potential vulnerabilities. Finally, it would be great if you could give your opinion on which one has more potential for growth and adoption in the long run. Thanks in advance for your insights!