The modern Dots tend to be a little heavier than the vintage styled ones, but of course there's always variance so if weight's important you'll just have to shop around. From my experience there are also tonal differences between the two, so that could be a consideration as well...
My Dot is somewhere between 8 1/2-9 lbs, and my '63 Block Reissue is almost a pound lighter between 7 1/2-8 lbs (I really want to get a fishscale or something to know exactly). The two guitars sound nothing alike, with the Dot having a warm, thick tone and the Block having a brighter tone without nearly as much low end.
Both are great and I like having the contrasting 335 colors, personally.
