Yes that is what im looking at. its rated at 1500 lbs. most 1/2 inch rope is a little under 9000 lbs.
most come alongs are 2 tons or more. Only advantage i see is the unlimeted rope
I agree that most rope is rated much higher than its working strength (which is usually half I think)
Another thing to consider with the come along is that most have a pulley which doubles the pull force. So your average 2 ton come along is really only rated for 2000 lbs single line pull.
I really don't have a better answer for ya. I use both, an old WWII willeys jeep capstan PTO driven from a tractor for long pulls where the extra reach is required and I usually double up with a block and tackle but I don't usually use it for pulling trees in a cut. I like to use a rope attached to the tree up high (in the crotch or branch or something) with a pulley anchored to a tree or something in the direction of the fall and use a truck or tractor to pull it over. That way the machine is driving away from the fall zone and I feel it gives me better control because you can't ratchet a come along but so fast and sometimes they like to twist or redirect in mid fall or bounce off of other tree branches. I don't know how tight of an area your working in though.
One thing to think about though is with the rope puller you can always pull the rope to take up the slack without having to ratchet it.
Maybe a more experienced feller can give you some better advice.
Best of luck