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Object detection plays a pivotal in autonomous driving by enabling the vehicles to perceive and comprehend their environment, thereby making informed decisions for safe navigation. Camera data provides rich visual context and object recognition, while LiDAR data offers precise distance measurements and 3D mapping. Multi-modal object detection models are gaining prominence in incorporating these data types, which is essential for the comprehensive perception and situational awareness needed in autonomous vehicles. Although graphics processing units (GPUs) and field-programmable gate arrays (FPGAs) are promising hardware options for this application, the complex knowledge required to efficiently adapt and optimize multi-modal detection models for FPGAs presents a significant barrier to their utilization on this versatile and efficient platform. In this work, we evaluate the performance of camera and LiDARbased detection models on GPU and FPGA hardware, aiming to provide a specialized understanding for translating multi-modal detection models to suit the unique architecture of heterogeneous hardware platforms in autonomous driving systems. We focus on critical metrics from both system and model performance aspects. Based on our quantitative implications, we propose foundational insights and guidance for the design of camera and LiDAR-based multi-modal detection models on diverse hardware platforms.