archive,reach around 666
andré´s,reach around 645
dont know it exactly,but should be close
as for the reach of pure street bikes(like ns):most have reaches around 630-645,so that isnt comparable really.
hta:the steeper,the more it feels to have weight shifted to the front,front wheel stuff is easier.but the bike gets unstable(kind of)on speed moves imo.
short cs are good imo,with no disadvantage,but can be preference though
bb rise:if you have the same relative handlebar height you get not much difference from that
for example my handlebars are in nearly the same position relative to the bb as on my old frame,which had +18bb,and the new has +50,and the difference is marginal(but its better on the rear wheel),and i can change stems to make it trialsy.
trials is an individualist sport,and so the preferences are pretty individual too
you´ll have to ride different bikes to figure that out,or guess and win...
or not