Is Deep Blue the same as Deep Blue Scuba? There's also Orpheus Dive or something...
Just google "PADI Singapore"
https://www.google.com.sg/webhp?sourcei ... 0singapore
Anyway, all the dive centers here in Singapore go to the same swimming pool for the pool training. And usually also share the same bus and location for the actual diving trip itself. Prices are almost the same as far as I can see online.
I had my OW and AOW at Gill Divers last year. Although when I was getting my OW, I met a lot of people from Deep Blue as well in the same trip.
Only difference? Just the Instructors and Divemasters I guess.