Quick answer
In most cases, route-dependent is better. Both can be slow; the better option depends on route quota and cancellation pattern.
When RLWL matters
RLWL should be judged by passenger-wise status, chart timing and recent movement in your PNR.
When PQWL matters
PQWL can behave differently by quota, train route and cancellations. Always check live status close to departure.