Mountain tourism plays an important role in sustainable rural development; it is closely linked to agrotourism practices, the use of methodological indicators for sustainability assessment, and the adoption of innovative and strategic management approaches. This study compares the key determinants that shape domestic mountain tourism destination choice among residents of Romania and Georgia. Based on 411 questionnaires in Romania and 440 in Georgia, principal component analysis (PCA) was employed, followed by ANOVA and Tukey post hoc tests. Four factors emerged in Romania, namely basic services, cultural activities, adventure tourism, and natural beauty, while in Georgia, these dimensions consolidated into two broader factors: basic services and natural beauty, and cultural and adventure activities. The results highlight differences in how tourists from the two countries structure and prioritize mountain tourism attributes, reflecting specific local contexts. The study contributes to filling the research gap concerning the influence of local particularities on destination choice in mountain areas and provides comparative evidence that destination choice determinants may be structured differently across mountain destinations.