Is SSID and ESSID the same?

yes， In most cases, people are used to calling ESSID 'SSID'.
More information: https://forum.huawei.com/enterprise/en/From-Beginner-to-Expert-WLAN-Common-Terms-Section-15-SSID-BSSID-and-ESSID/thread/532057-869

SSID refers to a single BSS
ESSID refers to an SSID spreaded among multiple BSS

Strictly speaking, when you speak about a single AP the correct term is SSID, when you speak about a network of multiple APs the correct term is ESSID (Extended SSID)

But it's only a terminological question, both refer to a wireless network name.