What is difference between LTE and LTE-M?

LTE-M (also known as eMTC and Cat-M1) is a Low Power Wide Area Network (LPWAN) technology suitable for low-bandwidth IoT applications, published by 3GPP in 2016 in Release 13. LTE-M uses licensed spectrum just like NB-IoT, and co-exists with NB-IoT as well as non-standardized LPWA technologies like Sigfox and LoRa, which don’t need licensed spectrum.

LTE (Long Term Evolution) is a fourth-generation (4G) of wireless cellular service standard for smartphones and mobile devices. It has been developed to provide higher bandwidth voice and data services. LTE/4G technology is what enables us to download and stream content on our mobile devices and tablets.