i have heard both an eclipse sub (7544) not the one that you mentioned, and an RE SE sub, in the same enclosures, with about 600 watts going to each.
in a 1.8 cuft sealed, the RE SE murders that eclipse sub, as far as spl, but the eclipse is a tad more punchy, which gives for better SQ
in a 1..0 cu ft sealed, the eclipse sounded better with the higher bass freq's, but the RE SE got louder, and lower than the eclipse.
in a 1.5 CU FT enclosure tuned to 41HZ (i have no clue why it was so high, but we tested it anyway) the Eclipse sounded louder to the ear (not by much) and got lower (once again, not by much) than the SE.
so it depends on what box you are going to have with it, and what kind of deal you can get with it,.
i like the se because it had more power handiling, and more movement.
once again, the eclipse i tested was a 7544 hybrid series..... and an RE SE