I think that in general a spouse visa has more chance of success than a fiancee visa. As long as you have met each other in person, have the income and finances to support a wife and suitable accomodation for you both to live in, there's not usually much else to stand in your way. To the ECO's it's a bit of a fait accompli because you've actually married, you've shown all the commitment that is needed.
Besides the fact that it is much cheaper to get married in the Philippines and you fiancee's family will be able to attend the wedding, it is also cheaper all round with regard to visas and your new wife will also be allowed to work in the UK from the day she arrives here.