Between the SC1894 and SC2200, which part is recommended for single-port and multiple-port applications?

The SC2200 is optimized for MIMO applications and does not really apply for SISO applications. The SC2200's power consumption (between 1.5W and 1.95W) is higher than the SC1894 (1.2W) for a single-channel application and its price is higher than for the SC1894. The SC1894 is still the best solution for single-channel applications.