 Relative to RPA predictions, however, the simulated sequence-dependent variation in T^*_{\rm cr} is often---though not always---smaller, whereas the simulated critical volume fractions are higher.
<clarity>  Relative to RPA predictions, however, the simulated sequence-dependent variation in T^*_{\rm cr} is often---though not always---smaller, whereas the simulated critical volume fractions are higher.
 Relative to RPA , the simulated sequence-dependent variation in T^*_{\rm cr} is often---though not always---smaller, whereas the simulated critical volume fractions are higher.