My company hires graduates from both schools so I am familiar with both.
Program: Both have strong CS programs. GT is rated a bit higher, if that matters.
Career opportunities: Both schools provide good career opportunities, but I’d give the edge to GT.
Dorms: the honors dorms at UMD are much nicer than GT dorms.
Location: UMD is suburban, located in a college town. GT is in midtown Atlanta so more urban (but does have a nice, contained campus)
Crime: much higher in Atlanta than College Park, but the GT campus itself is reasonably safe.
Beyond this, it comes to personal preference and fit. Does distance from home matter?
You said cost isn’t a concern but of course UMD will be cheaper.