I can't compare the two site since I have never been on PT site, but this site has been great for me. I am a do everything myself kind of guy and just watching all the high dollar projects done by the different shops and individuals have helped me without a doubt. Sometimes I do look around lat-g and feel like the poor guy on the site, but I'm good with that since I'm gaining the knowledge.
That's my feeling as well - lat-g just seemed to have a little bit more shop/pro builds and a little higher level of execution on the resident vehicles. LIttle bit higher level of tech.
I randomly will have 10-15 minutes to jump on a car site at different times throughout the day, so usually there isn't enough action on one or the other so I will click through my favorite forum sections on both. Each have a lot to offer and the conversation and post quality is infinitely better than other forums I have been a part of in the past.