Let's have a complete list
Sv 61 (Bt Batok to Eunos): Better frequency and more high capacity buses under SBS
Sv 67 (Choa Chu Kang to Tampines): More frequent and buses under SBS
Sv 75 (Bt Panjang to Marina Ctr): More frequent and buses under SBS
Sv 77 (Bt Batok to Marina Ctr): More buses under SBS
Sv 106 (Bt Batok to Marina Ctr): More frequent and buses esp PM Off Peak under SBS
Sv 167 (Sembawang to Bt Merah): More frequent and buses under SBS
Sv 169 (Ang Mo Kio to Woodlands): More frequent and buses under SBS
Sv 171 (Yishun to Marina Ctr): More frequent and buses under SBS
Sv 172 (Choa Chu Kang to Boon Lay): More frequent and better rt under SBS
Sv 173 (Bt Batok to Clementi): More frequent under SBS
Sv 175 (Lim Chu Kang to MINDEF): More buses under SBS
Sv 176 (Bt Panjang to Bt Merah): More buses and frequent under SBS
Sv 177 (Bt Panjang to Bt Batok): Same
Sv 178 (Woodlands to Boon Lay): More frequent and buses under SBS
Sv 180 (Bt Panjang to Boon Lay): Same
Sv 184 (Bt Panjang to Clementi): More frequent and buses under SBS
Sv 187 (Woodlands to Boon Lay): Same
Sv 188 (Choa Chu Kang to HarbourFront): More frequent and buses under SBS
... Can continue, but at this rate, it shows SMRT sv standard has dropped
