Personally, I would look at long term repairs and overall durability. I would go with the Northern lite if I could afford it. Never a need to replace, repair or could the roof other than vents. It can only leak through the vents and/or windows. Should you ever damage the molded fiberglass, back into something or maybe hit a limb, just about any boat repair shop or auto body can easily repair it. It will be insulated as good as any other TC I am aware of. I looked for years before I could find a molded fiberglass. I have had my 1988 since 2004, and have no regrets.
Wayne