Eclipse wins in sound quality thats for sure. So if your criteria is "nice" the eclipse wins. But I haven't heard how loud the eclipse gets, and I have heard the L7, which is loud as F
i heard an L7 or L5(Cant remeber) at a racetrack.......Yeah it noisy there...But we heard a system....Me and my freind Had just bought are Mb quart PWE 352's and RAA 1000....But hadnt installed them......SO we were curious...to see them.....THEY WERE THE WORST SOUND SUBS I HAVE EVER HEARD.....They were load but sounded like AZZ he wanted to sell them for like 500$ them thing needed to be thrown in a river...
eclipse will have better sound quality hands down. as far as spl i think it would be close because even though the L7 has way more cone area the eclipse has way more excursion. oh and the eclipse rms on the website is wrong it is closer to 1200 rms.