that second one actually looks like a yamaha. i had not heard of ct&t.
back in 98 and 99, i was a certified club car and ezgo mechanic. awesome job but not high paying. all the free golf you want though.
the only issue i ever really would be worried about it the frames being rusted. club car used to be the only aluminum framed golf cart so they were the most expensive brand. the ezgos, yamaha, harley/amf carts, and others were steel and the battery support area of the frame would always rust out. i am not sure how close you are to the beach but that is one thing to consider.
the brake pedal bushings will freeze on any brand if you are near corrosive water (irrigation or beach). they are brass and the arm is steel so you get dissimilar metal corrosion from the chemicals in the water getting in there and eating away the grease. its a very easy fix though as you just tap out arm and replace the bushings with more grease.
that ez-go is going to have the electronic controller and smart charger. is it a 36v or a 48v system? if the charger is square, its 36v. if its round, its a 48v system. the other one is probably 36v as that the most common one. back in the day, only club car made a 48v cart.
my parents bought a lifted ex-go a few years back. its gotten really noisy and rattles a lot. the lift kit for most carts is a going to make a lot of noise fairly quickly. club car lifts were different because it required cutting the front of the frame off and using a "Z" block to put it back on to get the lift so it was a pain in the butt. if you are not planning on lifting it and bigger tires, i would go with the club car. i don;t know anything about that other cart but it got bigger wheels so its probably not actually a golf type cart.
lots of golf cart companies made long carts for hospitals and transportation places. that second cart looks like its actually made for that kind of stuff and might have a more automotive type suspension set up. for sure, the wheels are larger and probably won't be available to the local tractor supply or walmart, like the golf cart tires are. golf cart tires can be put on with a manual small tire mounting machine that you can get really cheaply. tires are also very cheap for golf cart size wheels.
are you going to be carrying people on the back? they also make other stuff you can replace that back seat with that can be more useful, like a truck bed. or a seat that folds and gives you a flat bed to use as a truck bed.
if you are going to be hauling others, hopefully that club car is a 48 volt system. its a lot better for hauling but batteries are a bit more expensive.
batteries were 5-800 back in the late 90s, early 2ks. not sure now but get a good brand when you replace them. trojan is the best