The 6035 is a much louder box.It also natively has better bass though the Blockbuster is known for its low end.The Blockbuster does have a loudness control but its output is closer to the 6035s with it engaged.The 6035 doesn't have one and doesn't need it.The input wattage is the same as with the Blockbuster's 49w.
Looks are from two different schools.The 6035 is more of a sleek space age style while the blockbuster has that classic boombox "muscle" look.The line-in on both of these boxes is excellent.Though I prefer the feel of an analog tuner,the 6035s digital selectors has a particularly nice and curiously "solid?"
and intuitive feel.Both are top notch G.E. offerings from the pre-declining era.Personally I have both but prefer the 6035 overall.