Oh dear. Rambo has hardly any benefits. All he knows how to do is guerilla warfare and nothing else. By comparison, the T-800 has millions of detailed files giving it a range of abilities and skill sets. While these machines are more than capable of exterminating humans, they can do anything a human can do, 100 times better. A T-800 can even do math better than Claude Shannon. Their processor is constantly running binary mathematics, linear algebra, calculus, discrete mathematics, and statistics on the fly. Those are the back bone basics for computer science.
He’s human so he wouldn’t ‘break down’ like a machine would.
A T-800 is built out of hyper alloy, a more durable titanium that can easily withstand most guns except for those that use armor piercing rounds. They're built to last and they're programmed to do self maintenance. The T-800's nuclear power cell lasts for 120 years.
Personally, I would choose a T-800, mainly for financial reasons. They are super intelligent because of their CPU. This is why The First T-800 and Uncle Bob were able to process information like crazy and learn quickly at an accelerated rate.
Can you imagine what you could do with a machine like that? Getting a T-800 to do your bidding is like winning the lottery. It's a money making machine when it's not sent off to kill humans. You can order your terminator to go get a job working on Wall Street or play the stock market and give you all of the money. They're as smart as Einstein, an example of this is In Terminator Genesis, Sarah Connor's T-800 successfully jury rigged it's own time displacement equipment using it's files on quantum physics.