:agree2:
A grapple bucket still has sides, and it won't load logs worth a hoot. A good grapple rake can screen out the smaller stuff and grab huge piles of brush.
On minor drawback: a grapple rake has problems picking up piles of firewood. Since the grapple is only one piece, they tend to jam open on one piece of wood, and all the smaller pieces fall out. The grapple bucket usually has two independent grapples, so they are much better at scooping up firewood. Brush and logs: no.
Most grapple rakes have long points on the grapple part. You should be aware that your t-300 will have no trouble bending the points if you make a habit of treating it like a toothed bucket, plowing into the dirt and rocks.
Beware pushing into large loads too hard with the upper grapple. Your loader can probably push into a load harder than the leveraged cylinder mount points can take. Your cylinders may break off the mounting points if you open the grapple all the way and then drive into a load too hard.
We did that several times with our A300.