marriage here vs marriage in the Philipinnes.
It's 6 of one, half-a-dozen of the other.
Really depends what suits you (see other threads on this)

Basic difference, if u marry in the Philipinnes, you then apply for a spouse visa & bypass the FLR.
Additionally, when your wife arrives in the uk, under the spouse visa she can work immediately.

If its a fiance visa, she arrives & you have up to 6mnths (of visa issuance) to get married.
After the marriage, she then applies for the FLR, and only when that is approved, is she legally allowed to work in the UK.

In both cases, ILR must eventually be applied for

Horses for courses