I would say that Calis & Calis Beach are likely to be the same locationwise; Koca Calis is further away from the main prom, where a lot of the bars / restaurants are. As Koca Calis extends quite a distance, I wouldn't like to hazard a guess as to the walking distance.
As for comparisons with other resorts, it would really depend on when you visited them; Calis is definitely much quieter & more laid back than the present day Hisaronu, but is a buzzing metropolis compared with the Hissy of 25 years or so ago!