Oooh, oh, one problem. I had an IPA batch like this...one carboy full of hop sludge/break material, etc., the other with very little. I tried to wash the yeast from both. Washing the "non-trubby" yeast was easy, and gave me pristine looking yeast, perfect color, nice and thick.
The trubby yeast, however, was nearly impossible to wash. In spite of waiting for different lengths of times, lost of extra washes, the trub was just too thick to settle out and leave yeast in suspension...I got some of the trub out, but it was just TOO thick to all go away...in the end I got a slurry that was green and brown....I'm sure it still had yeast in it, but it sure wasn't "washed".
I ended up blending my pristine and brown/green yeasts together and used that for my next 10 gal batch....still worked fine...but be warned that excessive trub = a PITA for washing.