Comparing MN90 tables with others

I've got a set of MN90 tables (used by CMAS I understand) and would like to
compare them to ones used in the UK, but don't have any deco tables or deco
planner software..

In particular, the MN 90 gives (for air dives):
- a 2 min 3m stop after 20 mins at 30m
- a 1 min 6m stop and a 9 min 3m stop after 20 mins at 40m
- a 4 min 6m stop and a 22 min 3 m stop after 20 mins at 50m

Could anyone tell me how this compares with other tables? - and btw, no I
won't do deco dives without the proper training and equipment, thanks for
caring :o)

Thanks a lot

Greg