The usual FEL controller with a single "joystick" is much preferred for loader work because you can easily do combination movements simultaneously (curl/dump bucket while raising or lowering the arms), with one hand. You can probably do similar things with a two stick setup of course, but you have to take your hands off the wheel. Is that what you now have for your snowblower?
Not all FEL controllers are alike. Low end controllers do not give the operator the same precision movement capabilities of more refined (and expensive!), ones. If you can locate a new LA271 or LA272 package, it should come with the matching joystick controller, and you'd have to decide if it's a better quality control than what you've got at the moment.
Regarding loader specs, there's as much marketing hype in those ratings as you find in car horsepower and mileage claims. Several different ways they can be measured, for example. There's quite a tradeoff between lifting height and lifting power. I figure the manufacturer probably makes the most realistic judgement of how much loader to put on any given model of tractor, considering things like safety, not putting undue stress on the chassis and front axle, etc. Would be leery of some other loader that promises way much more lifting power for those reasons.
Hope at least some of this is helpful.