As I have now tried all of the Marriott Bonvoy hotels in Metro Manila, I feel qualified to write a short ranking:

1. Westin @ Ortigas Center - great bed, great shower, friendly service, tasty welcome gift, tasty restaurant breakfast
2. Sheraton Manila Bay - very friendly staff, nice bed, nice shower, slightly less appealing immediate neighborhood
3. Sheraton Manila - good breakfast, good design, stained bed covers, comfortable bed, smelly hallway, not really that convenient to T3
4. Manila Marriott - not a fan of the room design, no hot water in the morning, breakfast wasn’t that tasty, stained bed covers, bed not that comfortable, initial room had view of roof

I would likely only return to the first two properties and would also return to the GH, HR COD, and Conrad.