I don't know of any Kymco's with linked brakes. Linked brakes are not all the same but IMO most of them suck. Most linked brake systems are set up so that when you use the rear brake, you also get some front brake. The main purpose of traditional linked brakes of this type is to protect the idiots who are afraid to use their front brakes. I have only owned one motorcycle with linked brakes, a 83 Yamaha Venture which I put 72,000 miles on. Great bike but the brakes sucked. I doubt I would buy another bike with linked brakes. Honda puts linked brakes on all their scooters so they are unlikely to ever get my business.
Here's the main problem with most linked brakes. When you use your brakes, you really don't know how much is going to the front or rear brakes. In low traction situations or low speed tight turns, you can't use just your rear brake. Linked brakes add complexity and cost and weight to your bike while offering no real advantages to a skilled rider.
Moto Guzzi was the manufacturer that first introduced linked brakes. I don't believe any of their current models use it any more. Some companies like BMW use a system completely opposite from the traditional systems in that the front lever actuates the front and some rear brake and you can use the rear brake independently. I don't really have a problem with this.
Don't confuse linked brakes with ABS which does offer some real advantages.
If you have no idea how your brakes work and don't care to find out, then linked brakes shouldn't be a problem for you. In most situations you can't even tell if your brakes are linked.