As a current user of the RDS 001 MP (to which I added about 10 grams), I was surprised at how much I liked my experience using the 330g version of the 97. I didn't get to play with it long enough to see how the heft would affect me, but I do know that the 310g model is more appealing to me because I could change it with lead tape and keep it under or around 12 oz strung.
I like room to customize, but some people do not like changing their racquets from stock form. That would be your choice to make, but my money is on the 310g version for it's customization possibilities.
The other guys may chime in and help, but you struck a cord with your history with the 100 and wanted to add my input.
TW Customer Service