When you talk gas versus diesel its not a fair comparison. One is one thing the other is the other. So pick which one you want to use then you can make a intelligent decision on which rig you want to be your TV. So if you like gas then chose which gasser is better for your application. If you like diesel then pick which diesel is best for you application. When you talk tundra or 7.3 Well?? You could put the Tundra in the bed of the 7.3 and you wouldn't even know it's back there. That's not to say the 7.3 is better it's just saying they are built for two different reasons. Good luck with your choice let us know what you decide on.