Neck preference is definitely an individual thing, personally I like the Jem profile but not the Wizard, but then my favorite Ibanez profile is the older 19.5mm JCustom. The other thing to keep in mind is if the Ibanez you're looking at is a newer one, the heel width is also 2mm wider (58mm vs 56mm on your Jem). Not necessarily bad, just different. Always worth giving it a try. People like all kinds of different things - skinny necks, fat necks, tiny frets, asymmetrical backs. Hard to say until you've tried it. I've had more than a couple guitars that I'd swear I wouldn't like based on the spec sheet, but are some of my favorites once I played them.