Good question CC but they're probably equally effective for the task at hand.
The skimmer has been the most useful for me. Having the floats on it with long toss-ropes it reaches quite a ways, and as I pull it in, the front drops just below the water line and skims up any floating debris.
Both were cheap and effective, although putting all those zip ties on the "prickly rope" was very time consuming. But with a nice day at the pond, a lawn chair, a beverage and some good tunes, it wasn't so bad
Especially knowing this is what lied ahead
I wish you the best