I found this comparison on PPL. Longer seat and different flush system.
http://www.pplmotorhomes.com/parts/r...series-all.htm
Best price so far on a 320 is @ http://www.rvpartscountry.com/Dometi...let.html#tab-1
Jim
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2012 Ram Laramie 3500 DRW 4x4 3.73 Tow Max Pkg B&W Companion 60 gal RDS aux fuel tank. 2014 Montana 3150RL, 2 A/C's, Leather, 6 Point Jacks, Splendede WD2100XC, Mor/ryde X-Factor, Duravis 250 tires with TST 507RV monitors. 2 x Honda EU2000's
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