I have been using a pro 200 for the last few years and it is really good. I don't know much about the FT one but it should also be a good glue gun. The FT glue gun is on sale right now but it may cost more than the adtech because you would have to pay shipping from FT (unless they have free shipping or something). The adtech is on amazon with free shipping so it might end up costing less.
I can't say much about the other glue gun, but I can say that the pro 200 is absolutely amazing and so far I haven't had any issues with the amount of power or glue output it can give. I upgraded to it from a little mini glue gun and instantly fell in love.
Also, I got a 5 pound box of adtech glue sticks when I ordered the gun. I still haven't run out yet and have a few years of glue sticks left lol. Only costs 20 bucks too (also on amazon).