As far as fitting tools, if you’re a proper man and you own a load of sockets, they’re just as good as the Hope tools. You don’t need a seal driver either, it’s very easy to fit. But if you’re some sort of moisturised girlyman, and you don’t have a mancave well enough equipped to build an oil rig, then the hope tools aren’t too expensive.
Cheap bearings are cheap as the tolerancing is slacker. So you might get away with it, but there’s a fair chance they’ll wear out quicker than “quality” bearings
Not just that, they can be badly made, cheaper materials etc- I had some with brittle casings that chipped as I fitted them, and some that were rough from brand new. Decided it’s not worth the faff but mileage may vary o’course.