one is a moog--$94, the other is a masterpro, $22--both say lower...not sure other than the moog is better. Autozone has 2 also, $19 (valucraft) and $46(duralast).
Moog is the crazy expensive brand as you see but are supposed to be the best. Like stated, you're looking for upper ball joints, not lower, they're completely different.
That video is pretty dead on. I to used it as a guild when I did mine. In the video he wrote on the screen to use a socket to keep the top half of the ball joint as straight as possible. Do just that if not the ball joint removal tool will be all over the place and you scratch you fender. Believe me I know the hard way. I didn't have an impact wrench like he does in the video so I used a half inch ratchet. I also used WD40 once I removed the c clip on the top and hit it with a hammer a few times just to wake things up. Also be 100% sure when installing that the ball joint is going in perfectly straight. This is very important. If not you be buying new upper control arms.
I got one side done. The only question I have is about the axle. When putting it back in it didn't seem like it was in as deep as when I took it out. Will tightening the nut pull it back in tighter?