Black-throated Accentor
Prunella atrogularis
This is a dunnock-sized bird, 13.5–14 centimetres (5.3–5.5 in) in length. It has a streaked dark brown back, somewhat resembling a house sparrow, but adults have a black crown, face patch and throat, and a white supercilium. The breast is orange, and the belly white with orange stripes. Like other accentors, this species has an insectivore's fine pointed bill. Sexes are similar, but winter birds and juveniles are less contrasted. In particular, the dark throat may be almost absent in young birds. The call is a fine ti-ti-ti, and the song is similar to the dunnock's pleasant twittering.
ID text from Wikipedia, CC BY-SA 4.0
Brown Accentor
Prunella fulvescens
They can be identified by their white supercilium (broader behind the eye), blackish-brown mask, blackish-brown ear-coverts, yellowish breast, and yellowish belly. Males are larger than females.
ID text from Wikipedia, CC BY-SA 4.0

Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black-throated Accentor and Brown Accentor.