Hi Nightowl, firstly, welcome to the forum. It's a great place to get info.
Most JEM copies just LOOK like the JEM, with the monkey grip and tree of life inlay. They are usually branded non-ibanez, and rely on their looks to sell themselves. The JEM is a beauty, and if you've heard the guy who designed the series play them (Steve Vai), you'll find they sound awesome too.
The thing is about guitars, you'll want to be looking more for the tone and sound of the guitar rather than just the aesthetics. Most JEM copies look good, but sound terrible.
Most people would not recommend the JEM as a first guitar, because the price is definitely not a beginner price (unless you're the kind who drives a ferrari as your first car
![Big grin :D :D](https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f600.png)
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If you're looking for a first guitar, get something with quality, like an epiphone, ibanez, or fender. What kind of music do you play / want to play? What do your favourite guitarists use? Go wiki them and you might get a good idea what you want to look for.