Thanks for the suggestions – I’ve done some research and it seems describing shapes isn’t easy!
The bombers seem to be at the very flared end of the spectrum, with ergoterras at the non-flared end (basically it’s randonneur or Maes bars after that).
Middle of the table seems to be cowchippers, venturemax and Genetic digest all much of a muchness.
My findings from bomber to roadie (edit: table looks better in preview)
bar name reach drop flare
lovemud bomber 70 120 40 (guess)
Nitto RM-3 65 120 38
on one midge 65 112 30 (guess)
ragley luxy 80 85 25 (splayed/midge style)
woodchipper 80 110 24 (but drops are splayed as well as flared)
venturemax 76 102 24
cowchipper 96 115 24
genetic digest 76 110 21
salsa Cowbell 68 115 12
genetic flare 80 130 11
selcof sterrato 70 125 10
3T Ergoterra 89 127 6
I’d better do some work now…