I'm affraid your guess ' 1 green 16610 for 20/30 black 16610' is wrong
The 16610 is rare for being a Rolex but not that rare.
I talked with 3 dealers which I know very good, and asked them some info about the 16610LV. I can tell you that there are a lot more SS daytona's than 16610LV. All 3 off the dealers I spoke got twice as much 116520 than 16610Lv between the end of 2003 and the beginning of 2010.
One could give me exact numbers. He got about 85 SS daytona's in these 7 years and more or less 45 green subs.
If you want something collectible, place your bet on the first edition. The one made end 2003 till half 2004. also known as the FLAT FOUR