Define supraventricular tachycardia vs sinus tachycardia

Supraventricular tachycardia: it's defined as having a faster-then-normal heartbeat. there's many causes such as thyroid disease, caffeine, medications, or even stress.

Sinus tachycardia: it's a sinus rhythm with an elevated rate of pulses with a rate greater than 100 beats/min

Hope this helps! :)