i have used both. proxy cost less but you will use more oz / 1000. I did not have that great of results for it. Also check label for turf. it has been a while but it had some restrictions on where it could be used. I now use primo and it is great. 1 app in the spring to get through the rainy season. last year I thought I was ripping people off because when we mowed (7 days) we were not cutting anything. We were out there just so they seen us and paid us. I use it on the lawns we mow and fert, but also have a contract with a few people who only receive fert and they love it too.