Couple questions. Are all LVC 501s unsanforized except for the rinsed versions? I'm looking for a loose or regular tapered jean and found the 54 501 and 66 501 to match that fit, what is the difference between the two fits? Measurements seem to say the 54 is slightly slimmer. Are there any models that fit similar? And finally, is there much difference between the rinsed and rigid versions except the pre-wash? Thanks.