The second bird is a female Mangrove Blue Flycatcher; note the whitish lores and chin.
I think that the first is also a Mangrove Blue Flycatcher (but males are tricky). However the orange underparts are not as bright as I would expect on Tickell's Blue and the gradual transition to the white belly fits Mangrove Blue better (more abrupt in Tickell's Blue).
Great photos though - good photographs are often the best way to sort these tricky chaps out!
Best regards
Mike Leven
