I had a non-sealed and loved it as I just put foil on the pull out drawer and it was super easy to clean. Every couple of weeks I took it apart and cleaned the burners and took the top off etc. I think the unsealed really can help in that you can take things apart and really get in there. However, I have not had a sealed rangetop so I am not sure as to how those are with cleaning. Just thought I would mention my experience in case it helped.

I have the open burners and I wouldn't call it anything close to super easy to clean! :-) LOL We have 8 burners, multiple cooks of all ages, and use our rangetop so much, that cleaning issues are bigger for us than a lot of families, though.

From what I can tell, you just don't get a powerful gas stove and expect it to stay pristine. The well-loved and often-used look just has to be OK... Besides the flame configuration, I chose the open burners because of all the nightmarish cleaning stories I read here about sealed burner rangetops. Since having mine I haven't met anyone in person who thinks their gas rangetop is 'easy clean,' whether it's open or sealed. I think they just each have their own issues. I think the Wolf open burner rangetop might look nicer if it didn't have the shiny black burner pans, and instead had cast iron like the BlueStar, since I find cast iron more forgiving when it comes to cooked on spots..They blend as on cast iron cookware. I can't remember if the sealed burner Wolfs have the same shiny black porcelain coated finish, but mine has non-shiny spots that don't allow it to look clean or new any more. Hardly anything gets to the slide out catch pan underneath, and it cleans SO easily, that I don't worry about wrapping it with foil.

We're new to our Wolf sealed burner rangetop, but here goes: For me, I think it is easy to clean, I do agree with rhome that the shiny bottom makes every splash noticeable. With that said, I am the main cook, so I tend to tidy up after each use. I always was a tidy kitchen freak, so keep that in mind. We also have a griddle and I love it, find it also very easy to clean, and nothing not even eggs stick after it's seasoned.
We lucked out, I went looking for a Blue Star, as I had already priced out Wolf and SubZero, but needed to travel over an hour to find a dealer. I couldn't believe they were discontinuing their Wolf/SubZero line...so I now own a 48" rangetop, 48" SubZero, double Wolf Ovens, and a scratch and dent Optima Miele for,,, well a great price!

I would however buy Wolf even if I didn't stumble on this sale from heaven. I had a wee bit of an issue with the ovens (I followed the instructions to heat the ovens initially to 500 degrees..this is not the thing to do..according to the service guy who also said Wolf Ovens are Very Good ovens. Good luck with your decision, I think you will love your Wolf as the rest of us do.