Definatly lighter.
Just recieved my Centerlines last week and I love them.I bought the 20's,they might be a little heavier than I expected but they are still extremly light for 20's.
Hodgee,check out my pic's in my signature under BigKid's new site.Your truck is a black step-side too isn't it?Should give you a pretty good idea of what it would look like.

 

Dude your truck is low. I originaly wanted 4/6 like you, but I know me, and my driveway wouldn't like it to much. Plus I was to scared to notch my frame, and scared of hitting curbs. I thought that I would be dissappointed with the 2/4, but with the Hotchkis kit, I love it, and the looks are really fine for me. I actually got about 2.5" in front, and almost 5 in the rear after a week of the suspension settling. So it kind of worked out. I love the rims on your trucks, and I am getting the newer Stingrays that just came out, you can see them on that link I posted! Now, I just need my truck to run as fast as yours, then I might be happy! LOL

 

I recently put 20x8.5" Centerline Lexi II's with 275/45's on my truck. They weigh 65lbs as compared to the stock ones that weighed 51 lbs each. I can tell a difference, but it doesn't ride much worse than it did before. There's some pics in the web page link below.

 

It must be quite like a tomb in your truck!, that is psycho dynomat. You must really care about sound quality!

 

I'm trying to get it quiet.

 

Center line uses a good alloy, eventhough the rims are lighter thay are not necessarily weaker.

ANY pounds you can get of the truck will help. Remember, flying bricks.

Rims are unsprung weight and rotating weight the worst kind of weight. An old hotrod trick in the day of drum breaks was to use aluminum drums.

 

Stingray III's just came out in March.(are so I was told by centerline)

 

Oh, you got the Stingray IIIs, I am looking at the Stingray lightweight, with gussets for strength, then they have a Stingray II that has double the gussets. Only the first Stingray is in there lightweight series. Now the catalog I got says that the Stingray IIIs only come polished. But yours look so brite, I was wondering if they were chrome or not? All these rims are light, but the Stingray I, showed the lightest, that is why I decided to get this one instead.

 

I think my 18x8 Centerline Tracer / Yokahama 285/18/50 tires weighed in at 61#'s each. Not to bad, but deffinatly notice it over stock. They actually weigh about the same as the 17" combo I had.

 

Centerline has two lightweight rims in there series, beyond all them being lightweight, these are rated the lowest. They are the Standard Stingray at 21lbs for the 22" rim, and 19.5 lbs for the 20". Also they have one called the MACH I that is only available in 22", and it is 21lbs also. They are now the lightest rims out there. Centerline claims in their catalog that all other 20" rims weight no more than 35lbs a piece.

The tires that I was looking at are supposed to be 32lbs according to Discount tire, so I guess with compression they should weight in at 60lbs or so. I took off one of the stock rim and tires and weighed it on my bathroom scale, and it was 60.5 lbs. So If I can go 20"s without increasing weight at all, that is freakin sweet!

Oh, one more thing, according to this catalog, a max of 33" tires is allowed on these rims for safety. So if you are thinking of one for your lifted 4x4, I don't think you could use them safely. Good thing I got a light 2wd truck. Can't wait to order them, gotta wait till tommorow on payday!