What’s the difference between “high-end” and “luxurious”?

My real estate business centers squarely on the luxury, high-end, upscale market. My work involves touring, listing, marketing, comparing, and selling upper-end homes in the Gallatin Valley. After nearly 8 years of concentrating in this niche market, I feel rather strongly that there is a difference in the connotation between “high-end” and “luxury” when discussing property. Please keep in mind this relates to real estate, and while it may apply to other items being sold or purchased, my focus is property.