Sickle Bar NH 478 & 472 Haybines what's the difference

[Casa Del Paca]

I recently got a great deal on two haybines. They have both been sitting under a tree for several years and need a little TLC. The 472 seems to be the best and I plan to use the 478 for parts. Unfortunately, I can't find anything that tells me what the differences are in these machines. Does anyone out there know? Thanks in advance for anything that you can give me.