Vref is usually set at 1.3 Vs.
Do the 737 or A320 family ever use Vrefs that are higher than 1.3 Vs? I don't mean wind correction and those things, I mean a systematic increase based on tail clearance or the like.
If one type uses an artificially higher Vref, then that should be identified as a 'threat' to safe landings. It's nothing that can't be mitigated, but something that should be considered by the OP.