When the Remastered Robotech series came out, I was really on the fence about getting it. I have the original DVDs, and those are what I remember as a kid, so it was all I needed.
I eventually bought the remastered series a few years ago to replace my aging original DVDs. They did leave a lot of the original footage that was cut out for the American release so I decided to keep the original DVDs for the original editing.
I never compared them side by side, though. Holy cow, that remastering makes the show look completely different. I'm guessing they used the ADV Macross remaster as the base for Robotech Remastered, but seeing the larger viewing area more saturated colors and TONS less grain was worth the purchase.
Even if I didn't know it at the time, or even notice it till today....