Yup. Plus, you will have to weather the heck out of the T-800 anyway, as the chrome job isn't accurate to the real props. Way too reflective. So either way, it's about what you think will be easier and look the best once finished. The T-700 has to be stripped, which is a PITA to do, the T-800 doesn't, but the teeth detracts a large enough amount for me to pick going through stripping the T-700 instead.
Plus... I got a damaged T-700, so I got it cheap. Bust sadly... they are listed on eBay at insane amounts right now. Definitely not worth that price. Anything beyond $350+shipping is way too much for this piece.
But everything has gotten really expensive on eBay these days. The old Tsukuda/Halcyon 1:9 scale kit that usually sold for $35 or less have skyrocketed to above $70 all the way up to way above $100. Insanity.