Yes, there is a huge difference when it comes to durability and they are kind of different purposes.
Head cement is basically lacquer. You use it more for just sealling a coupler of thread wraps. it soaks in and you really dont see it.
Sally Hansens Hard as nails (clear nail polish very popular with fly tyers- is probably better for durability.
Epoxy and the UV stuff, you actually build up a durable glossy head with it. I t dries hard as a rock.
5 minute epoxy is cheap and easy. Disadvantages is the fumes coming off it are not so good for you and with age it can turn yellow. The stuff they coat rod wraps with is a 2 part epoxy.
I just got I just got the UV system. So far it's really terrific.
This light is half the price of the ones intended for fly tyers and it works just fine with solarez.
UltraFire UV Flashlight 395-405 nm Led Blacklight with 18650 battery and charger for curing UV glue, Leak Detector, Pet Urine Stain - - Amazon.com
I highly, highly doubt that the ones that sell for 50 bucks and up are made in a different factory in China.
If money is an issue, go to home depot get some two part epoxy. Get something to mix it on. A bathroom tile works good and a couple toothpicks. Work with good ventilation.
People who do a lot use a rotating dryer. But if are just doing a couple you can just twirl it by hand or in a rotary vise.
When you coat a clouse the way Bob Clouser does in the book it becomes nearly bombproof.