Neither, both seem priced very high with that mileage....
I'm not a huge Kelly Blue book fan, but it is used as a standard many times...You can check NADA too.
KBB has the Colorado in perfect shape with that mileage @ $14,500 (avg 10k a year,below avg)
KBB has the Toyota in Perfect shape has high as @19,400 with that mileage (18k avg a year, above avg)
Personally.. I'd pass on both.
If you have to have a payment too.... The older higher mileage Trucks can't go as long for loans.. Which will make your payment higher.. A new Truck with less options can go longer and make payments cheaper... Buying New is better then buying something is 75k-120k mileage unless is under 10k price.
Think of this... You buy a brand new truck for 25-30k and your payment will be close to the same as the above.. but with no mileage, your the 1st owner... All you have to do is own it for 6yrs... By the end of the 6yrs. It's paid off, 1 owner... With the same mileage as above choices... But now you have No payment.... Oh also add the better warranty you get when buying new.
The old saying of buying new is a rip off and the value drops as soon as you drive it off the lot.. Don't hold as much nowadays... Due to lower % rates.. Yes it does drop value, but after 3-4yrs... You won't be under on it. It should be worth more then you owe..