What is the difference in these?

[codielenore]

So I'm looking at replacing our water heater and both of the following are a gc6aa-10e but they have a little different bottom piece by the looks of it. the second is 75$ cheaper than he 1st pixlc so I'm wondering if id be safe with the second or if anyone knows the difference in these. they are the same model. thanks https://cdn.shopify.com/s/files/1/0765/6747/products/gc6aa10e-atwood-heater-front-whitedoor-formatted.jpg?v=1454356319

http://www.johnsonssurplus.com/products/atwood-hot-water-heater-6-gallon-gas-lp-electric-gcaa-10e?utm_medium=cpc&utm_source=googlepla&variant=42 62288069&gclid=CjwKEAjw7qi7BRCvsr3N58GvsTkSJAA3UzL vtOnSNL3CDs2mvFd9-oMOLfGSr5xbgmqVTZCPhQRcYhoC_bnw_wcB