BPDU Guard. The difference between BPDU filter and loop guard

"Bpdu Guard (BPDU protection)"
BPDU Guard enables ports with Portfast characteristics to enter the Err-disable state when receiving BPDU to avoid bridging loops, which can be configured under Global or interface (default shutdown)
"Automatically recover when Port enters Err-disable"
You can use the errdisable recovery cause bpduguard command to automatically restore the status of the opening port (the default is to restore every 5 minutes)
"Bpdu Filter"
Unlike BPDU protection, BPDU filter is configured in a global or interface mode with a different function, and when enabled in the Postfast port mode, the switch will not send any BPDU, and when all BPDU received is discarded and enabled in global mode, when the port is receiving any BPDU , the Portfast state and BPDU filtering function are discarded and changed back to the normal STP port (BPDU filter feature is closed by default)
"View commands that BPDU guard and BPDU filter are open"
Show Spanning-tree Summary
"Bpdu Guard and BPDU filter Priority"
When both Bpdugraud and Bpdufilter are enabled, Bpdufilter priority is higher and bpduguard is invalidated
"LOOP Guard"
The Loop Guard is primarily used to avoid the failure of a blocking port to transition to a forwarding state and to produce a bridging loop; When the switch does not receive BPDU on an unspecified port on which the Loopguard feature is enabled, the switch causes the port to enter the STP "inconsistent loop" (inconsistentports) blocking state, when the inconsistent port receives BPDU again, the port will automatically filter to STP state according to BPDU. The inconsistent port status can be viewed through the SH spanning-tree inconsistentports command. The Loopguard feature is turned on by default.