I own a JD 450E dozer, they are about 18k lbs. I have personally logged over 2000 hours on this machine. There are a direct competitor to a CAT D3. A one ton truck is woefully inadequate to tow it and in my state should you get caught towing it with such you will pay a fine in excess of $1000.00.
The 450 series dozer has been the smallest JD dozer for over 20 years. They used to make a 350 series (about 12k lbs), I have operated a 350 and it has very limited ability due to it's light weight and low power.
A 450 series dozer is a very desirable unit as it is big enough to do serious work yet small enough to work around buildings and tight spots. For this reason contractors love them. In terms of pushing dirt there is zero comparison between the
BX24 and a 450 dozer. A 450 dozer is a very capable machine and as someone else said of thier CAT D3, it essentially goes where you point it. The writer who stated a JD 450G was useless had a machine that was not operating properly or perhaps did not have the experience to operate it properly. With that said it is not designed or capable of clearing large tree's etc. for that you would need a JD 850 or CAT D8, both of which are very large machines in the neighborhood of 60k lbs.
A dozer with 30hp weighing 6600lbs. would be useless for your application. I would equate it to using a dozer blade on a similar sized Bobcat skidsteer. Yes they do sell them for skidsteers but for snow removal or very light dirt work.
I would stick with the
BX24, it will take you longer but the machine with a BH and FEL is capable of getting the job done eventually. I do not believe that the 6600lbs. dozer is capable of your intended use at all. Another option is to rent a real dozer for a week.