What is the difference between internet SIM card and Mobile WiFi Hotspot?

Feature Mobile Hotspot Data SIM
Work with locked devices Yes No (works strictly with unlocked devices)
Requires to change APN and roaming settings on your device No Yes
Requires to replace SIM on your device No Yes
Tethering (data sharing) compatibility Yes No
Keep your phone number abroad Yes No
Number of devices that can be connected via tethering option Up to 15  N/A
WiFi signal range Approx. 10m/32ft N/A
Battery life 7 hours of usage
13 hours standby time with WIFI on