Airborne gravimetry is an important technique for gravity field determination and sub-surface interpretations in geophysics and exploration. Traditionally, stable platform gravimeters were used, which maintained the gravity sensor's alignment with the local vertical. Recent advancements resulted in an increased utilisation of strapdown gravimeters. This study compares the performance of a GT-2A stable platform gravimeter and an iMAR iNAV-RQH-1003 strapdown gravimeter, which were operated simultaneously in an airborne campaign at East Antarctica. Furthermore, novel combination approaches for the individual gravimeter solutions are presented and assessed. The strapdown gravimeter demonstrated superior overall precision (1.71 mGal without crossover adjustment, 1 mGal = 10⁻⁵ m/s²), lower high-frequency noise and lower line-to-line biases compared to the GT-2A (2.40 mGal) but was susceptible to significant flight-to-flight biases. However, the elimination of these flight biases is possible through the estimation of a single bias per flight via crossover adjustment. Moreover, the benefits of strapdown technology, including reduced space, weight, and operational requirements, contribute to the growing preference for strapdown over stable platform gravimeters. All combination approaches yielded improved solutions compared to the single gravimeter results, despite the different noise levels of the single gravimeter results. After crossover adjustment, a precision of 1.0 mGal was obtained. This highlights the potential for enhanced gravity field determination when using two or more high-precision gravimeters, provided that their frequency-dependent noise characteristics are considered appropriately.