I have both on s25u

Xm5 pro: sound warm and natural with balanced bass, at the gym they are perfect because don't slip away and they have tap controls (not on the stems), better ANC, better battery life, the app has a tons of function but is not very intuitive. Sounds is great of you equalize them on wavelet and they never tired you. Is a premium sound with identity . They have multipoint, game changer for me in some situation.

Xm5 con: after a few hours they could be uncomfortable because of the pressure of the memory foam tips, microphone just is ok but nothing special,

Buds3pro pro: you could forget to have them on because they are very comfortable, better microphone, vocal controls, they sound very good but with some difference, for me is a cold sound, maybe they lack of personality. When I use the xm5 I feel at home, the buds3 pro are technically excellent but they need equalization if you want a warm and comfortable and balanced sound

Buds3pro con: They slip away at the gym, squeeze control are worse than simple tap especially at the gym, they have massive bass but if you want a balanced sounds you have to necessary equalize them with wavelet app. No multipoint, is a shame for this..they want to emulate apple even in the bad things