the toolcat is not good at hard digging/pushing compared to a skidsteer. i'd reckon its about the equivalent of a s130 in the digging stakes. the other weak point is that you can shuffle/wiggle with a skidsteer but the toolcat cannot (if you know what i mean)
it is great for lift and carry operations, for not making a mess of your yard, for carting your kids/grandmother around and for any operation that requires moving further than the dirt pile to a truck. on the lift point beware it has a lower lifting height than most skidsteers.
it feels comfortable on slopes, many places i take it i'd not even consider taking a skidsteer up/down. its ok on cross slopes, mainly limited with what you feel comfortable with.
the d series (the current model) seems to have the traction a bit better sorted than the earlier ones tho having some weight in the tray helps a lot. I'd be circumspect of the a & b series, they changed the loader arm for the c series and thus fixed a few limitations. c&d run the same arm setup, d has independant suspension all round.
its rated at 1500lbs lift capacity, it'll lift a ton pretty easitly, about the only limitation is how much sway you can put up with in the loader arm - given its a central arm long objects like a 40' telegraph poles tend to be intertesting to carry.
in a nutshell, if you want to just load trucks stick with a skidsteer however if you want a good flexible tool that does a lot of things quickly and easily the toolcat is a good thing.
i've both a toolcat and a S185 coincidentally. the toolcat is far easier to use mostly. i've so far run my entire attachment range on the toolcat including a hammer, landscape rake, brushcat, grapple bucket, trencher, auger, soil conditioner etc etc.
if i was fencing full time i'd use a skidsteer unless the turf is precious. i'd choose the skidsteer cause you can work the auger as you dig plus the toolcat use a radial lift and its quite a radius.
if you go down the toolcat path, tbn has a reasonable section ot TC.
My main tip is learn to clean your fan properly especially if you mow/slash with it.