Should I use Kraken or Coinbase?

I'm curious about the best cryptocurrency exchange platform to use, and I'm torn between Kraken and Coinbase. Can you help me understand the pros and cons of each platform? I'm particularly interested in factors like security, fees, ease of use, and the range of coins they offer. Is there a clear winner between the two, or does it depend on individual needs and preferences? Additionally, are there any other exchanges worth considering for a first-time user like me?