I would go with whichever has the most hp. The 5410 would easily handle it, but if the skidsteer has more HP then go with that, I assume it does.
Your specs may list how much hydraulic hp it has, based on pressure and flow.
I have a much smaller tractor and really want more power, but as far as size goes I can handle it just fine, the tractor doesn't vibrate or shake much at all when using the grinder. Sure would like double the PTO hp though :laughing:
Visibility would most likely be substantially better from the skidsteer. I can see enough from the tractor seat to work it fine, but more visibility is always better.