This may not be too much help, but I'll try.  I've been using the #1 blue for a long time now.  I started with a sample pack that had all 4 colors.  The only ones I tried were the #1 and the #4.  I remember a distinct difference between those two.  The grey was quite a bit thicker and slower than the blue.  Between the red and the blue...not really sure.  

I have found since using the blue that the more you stretch it on your thumb, the quicker you get out.  If you want something a bit slower, try applying it without stretching it.  This is assuming that you stretch it now.

Don

I''ve used both.  I find the Red to be nearly the same (as in functionality) as the blue.  Where Blue is micro-thin and Red is every so slightly thicker (feels slightly different as well).  You will not have a problem with your thumb exiting if that''s your area of concern.  There is a considerable difference using the other colors.

Edited on 4/9/2010 9:48 PM