The TSU9600 is completely customizable. Both the look and function of the interface is yours to create. It's also a brand new remote product from Philips, part of the new Pronto Professional line. In contrast, the RC9800i is an older remote from Philips which is not customizable as the Pronto remotes are. This remote is severely limited in it's capabilities and flexibility as compared to the TSU9600.
To learn more about the RC9800i I suggest checking out the appropriate forum area. I don't have first hand experience with this remote myself. I did recently outline many of the improvements the TSU9600 brings over the Pronto NG line of remotes however. Said post can be found
here.