Introduction: Traditionally, non-palpable breast cancers have been localised using hookwires. Savi-Scout® is a reflector-based wire-free localisation system designed to improve efficiency and patient experience. It involves the placement of a fiducial reflector at the tumour site, detected during surgery using a handheld probe. This study compares the efficacy and oncological outcomes of Savi-Scout® versus hookwire localisation. Methods: A retrospective analysis was conducted comparing Savi-Scout® and hookwire localisation techniques for wide local excision of breast cancers from January 2023 to December 2024. Data collected included patient demographics, operative details, histopathological findings, and re-excision rates. Results: Fifty patients underwent Savi-Scout® localisation, and 50 underwent hookwire localisation. Oncoplastic techniques were utilised in 20 Savi-Scout® patients compared to 5 in the hookwire group (p < 0.0001). Mean operative time was shorter with Savi-Scout® (74.2 minutes vs. 86.6 minutes, p = 0.022). Specimen weight and volume were comparable: 41.06 g vs. 42.27 g (p = 0.834) and 47.3 cm³ vs. 50.6 cm³ (p = 0.681). Re-excision was required in 8 hookwire patients compared to 2 in the Savi-Scout® group (p = 0.035). Deployment issues included one reflector migration (30 mm) and one placement failure in the Savi-Scout® group, with one case of hookwire migration reported. Conclusions: Savi-Scout® demonstrated shorter operative times, fewer re-excisions, and greater use of oncoplastic techniques. Despite its limitations, such as reflector migration and placement failures, Savi-Scout® shows promise. Larger prospective trials are needed to validate its benefits and assess patient outcomes comprehensively.