If comparing luxury to another level of comfort:
* More luxurious - This is the most straightforward comparison, implying a higher level of luxury.
* Luxuriouser - This is a less common, informal, and sometimes humorous alternative.
* More opulent - This emphasizes grandeur and lavishness.
* More sumptuous - This highlights abundance and richness.
* More exquisite - This focuses on refinement and fine detail.
If comparing luxury to something else:
* More comfortable
* More spacious
* More sophisticated
* More elegant
* More refined
The best choice will depend on the context and the specific aspect of luxury you want to highlight.