Difference between Yellow-browed Warbler and Kloss's Leaf Warbler in Vietnam

The difference between the Yellow-browed Warbler and the Kloss's Leaf Warbler in Vietnam:

1/ Yellow-browed Warbler
- No pattern on top on the head;
- White underparts;
- More whitish light gray tone;
- Brow (supercillium): more white tone;

2/ Kloss's Leaf Warbler
- A blur vertical line (stripe, streak) from the upper base of the bill to the bottom of the nape;
- Dark patches (grey or black) on the sides and/or on the vent;
- More yellowish tone;
- Brow (supercillium): more yellow tone;