Hi Dixie, welcome.
They don't have villas in Olu Deniz but there is Hisaronu and Ovacik which are about 10 mins away by Dolmus. Calis is 2 dolmus rides away from Olu Deniz, will prob take about 40 mins on bus to get there.
Everyone will prob get angry but in my opinion Olu Deniz is in a different league to Calis in terms of the beauty of the place (excluding sunsets) Olu Deniz beach is just so much cleaner and there is so much on offer like parasailing, renting pedalos, canoeing etc and the blue lagoon is so nice for swimming in.
I'm sure you will enjoy your holiday wherever you go though.