My first PRINIA - Birding at Batu 18 Batu Malim, Raub

I spend four hours birding alone at a loging track at Batu 18 (18th mile) Batu Malim, Raub during Agong Birthday holiday on Saturday.
Rewarded with four birds lifer and one mammal. This two birds are very difficult for me to ID.
It look like warblers, finally got the ID from Birding in Malaysia website.

Yellow-bellied Prinia (Prinia flaviventris), size = 13cm.

Rufescent Prinia (Prinia rufescens), size=12cm