Caloy,
I really think Anilao and PG are more than just different - I stand by my statement that Anilao, on the whole, has better diving.
In PG, Canyons dropping over to fishbowl is truly a great dive - better for the most part than any one dive that Anilao has to offer (though Bagong Bahura is spectacular when it's 'diveable'). But I think the rest of diving in PG really isn't anything too special compared to Anilao. The coral cover and diversity of small critters are better in Anilao, there is certainly as large a variety of conditions (walls, drift, slopes, muck swim-throughs, cave, etc) and even though PG likes to claim Verde island as 'theirs' it is certainly accessible from Anilao, and actually a cheaper option for a group of Anilao divers.
I admit you are more likely to see 'big fish' in PG and that the nightlife, of all sorts
, has a lot more options that Anilao. Actually, one of my favorite spots in PG isn't so commonly visited - Hibo over at white beach. A really great wall but the shops in Sabang seem reluctant to make the trip over when they can make just as much money shuttling group after group to the dive sites 15 mins from Sabang.
In Anilao, you call the shots with your boatman as long as you are willing to pay for the trip. In PG they are getting$15 - 20 per trip no matter where they go, so it's cheaper and easier to do the same thing over and over. A different mindset and I prefer the more 'do it yourself' attitude in Anilao.
These opinions are after about 10 trips to PG and more like 30 or more weekends in Anilao so, while i'm no expert on either, i've had a good chance to see the best both have to offer i think.
Just my .02 centavos