I have a long bottom grapple for my MX. It has the ability to carry much more of whatever.
If all you handle is logs and brush, i think you will be happy with either.
But sometimes I use mine more like a bucket. Carrying a bunch of firewood, chainsaws, more than one rock (that are large enough not to fall between the ribs), etc.
If you use a grapple much at all (and I do) there is no way I would constantly be wanting to take my hand off the joystick, find the rear remote lever, actuate grapple, them back to the loader joystick. That would get annoying real quick.
You need to decide on a 3rd function of a diverter. Both about the same cost, both equally simple to install, and both can be controlled with a simple button installed on the joystick so your hand never has to leave the control. Functionally they operate a bit differently, but in reality there is little difference for the average user and they BOTH preform very well