STOmics vs. Visium: A Spatial Transcriptomics Comparison Guide

When our team at STOmics discusses the landscape of spatial transcriptomics, we recognize that researchers are presented with meaningful choices. Selecting a platform is a significant decision that influences experimental design, data output, and potential discovery. This guide aims to provide a structured, side-by-side look at two prominent approaches in spatial transcriptomics, focusing on core technological differentiators to aid your evaluation. Understanding these parameters is essential for aligning a platform's capabilities with your specific research goals in spatial omics transcriptomics.

Foundational Technology and Resolution

The most distinct difference lies in the underlying technology and its resulting resolution. The 10x Genomics Visium platform utilizes a method where tissue is placed on a slide patterned with barcoded capture probes. This provides a valuable spatial map of gene expression. In contrast, the STOmics Stereo-seq solution employs a different approach, using DNA nanoball (DNB) patterned arrays. This foundational difference is critical for spatial omics transcriptomics. A key comparative point is resolution: while Visium captures data from spots measuring 55 microns, the Stereo-seq technology from STOmics achieves what is described as subcellular or nanoscale resolution. This higher resolution in spatial transcriptomics allows for a more precise mapping of expression within individual cells and their immediate environment.

Transcriptomic Coverage and Field of View

Another vital area for comparison is the breadth of measurement and the physical area analyzed. For spatial transcriptomics experiments, the balance between detection sensitivity and the size of the observed tissue section is important. The Stereo-seq Transcriptomics Solution v1.3 from STOmics is designed for whole transcriptome analysis, aiming to capture a comprehensive profile of RNA species without the need for pre-selected targets. Furthermore, it supports a very large field of view, capable of analyzing centimeter-sized tissue sections in a single run. This combination of whole-transcriptome coverage and expansive field of view is a particular point of distinction in the field of spatial omics transcriptomics, potentially enabling both highly detailed and broad tissue contextual analysis within a single experiment.

Workflow and Platform Evolution

Practical considerations in the laboratory are equally important. Each platform involves specific workflows for sample preparation, library construction, and data analysis. The recently upgraded Stereo-seq Transcriptomics Solution v1.3 emphasizes a refined user experience through optimized chemistry and a more streamlined workflow. The evolution of a platform, evidenced by such version updates, indicates a commitment to improving efficiency and compatibility for researchers engaged in spatial transcriptomics. When comparing platforms, examining the total workflow—from tissue preparation through to data delivery and the available bioinformatics pipelines—is a necessary step. The integrated "tissue-to-data" experience offered by solutions like those from STOmics is a factor that can significantly impact project timelines and complexity.

Choosing between platforms for spatial omics transcriptomics depends heavily on project-specific needs for resolution, transcriptomic depth, and tissue area. For studies where subcellular mapping and an expansive field of view are priorities, the Stereo-seq technology provides a distinct approach. As the field advances, these technological comparisons help clarify the path forward. At STOmics, our focus is on continuously refining our Stereo-seq-based solutions, as seen with v1.3, to provide researchers with a powerful and efficient option in the dynamic field of spatial transcriptomics.