I guess we could do the math...

Sink................Area (LxW)................Volume (LxWxD)
S105D Bowls
....Large..........328.375 sq inches..........2,955.375 cu inches
....Small..........173.25 sq inches............1,212.75 cu inches
S105 Bowls
....Large..........283.5 sq inches............2,268.00 cu inches
....Small..........139.75 sq inches............ 978.25 cu inches

If going strictly by the above calculated dimensions, I would say the S105D will give you more overall usable space. Have you measured the items that you will be washing/drying the most? Do they all fit?

If you are planning to wash your dishes by hand rather than use a DW, do you plan to have a dish drainer to put the clean dishes in? That would give you the large bowl for washing, the small bowl for rinsing, and the dish drainer for dripping :-)

If all your everyday dishes and most of your pots & pans will fit in the S105D, then I recommend that one.

HTH!

Thanks behul. It never struck me to do the math nor measure the pots and pans. I really appreciate all the time you take to answer these questions.