The BIG difference is that the LA352 was engineered specifically for the B2410, therefore your loader won't damage the tractor or viceversa. The next difference is the regenerative hydraulic valve on the Kubota loader; it allows you to curl/dump at the same time as raise/lower without losing half or more raise lower speed. It does this by creating one large hydraulic circuit when you have both sets of cylinders engaged, instead of 2 circuits competing with each other. The next issue is ease of mounting/dismounting; most after market companies are adequate at best when compared with OEM loaders.
The Bush Hog M146(GB has a model excatley the same since being bought by Bush Hog, I don't remember the #) have the regenerative valve available, and they are my favorite if you definately WON"T get a Kubota loader, but remember, they were also designed for the Big B's;2710 and 2910, so they look a little ungainly, and are capable of lifting more than the 2410 front end was designed for. This is the reason you have to be careful with aftermarket loaders: they are designed to fit many brands, and many more models, just by changing the mounting kit, if you have a tractor in the middle of the range the loader was designed for, you're OK, but if not...so bigger buckets are not always better with certain materials.
As for the $150...pay it gladly! Kubota allows 4 hrs of flat rate for mounting a B series loader, @ our shop rate, that's $200, and the after market loaders all come with poor directions, jumbles of nuts and bolts, and many more bolt together parts (instead of welded brackets) so we generally build a couple more hours shop time into the purchase price. Pete