Chevy Tahoe or Trailblazer?

Hello together, I would be happy to hear your opinion and tips on the following. I’m looking to buy a Chevrolet Trailblazer 4.2 or Tahoe 5.3. I’ve read and learned a lot about the Tahoe. Only about the Trailblazer not much yet, e.g. some points I’ve heard say that the Trailblazer is qualitatively worse than the Tahoe. Are there restrictions on the autogas conversion at the Trailblazer? What can you advise me to do? Thank you Madiba