[Samsung Galaxy S7 (Exynos) ROMs, Kernels, Recoveri] lklaus:
Just did the test, but no difference, even though I think the logcat looks a tiny bit different:

02-01 19:35:12.541 4183 4410 D SecHAL : read_thread: Sent message to HAL message task, remind que: 2
02-01 19:35:12.541 4183 4411 D SecHAL : nfc_hal_task: Got a event: HAL_EVT_READ(4)
02-01 19:35:12.541 4183 4411 D SecHAL : nfc_hal_task: current state: SERVICE
02-01 19:35:12.542 4183 4411 D SecHAL : data_trace: Recv( 24) 61 05 15 01 01 80 06 ff ff 0a 09 00 16 17 21 01 00 a0 07 e0 06 00 00 00
02-01 19:35:12.542 4183 4411 I SecHAL : OSI_timer_start: enter,osi_lock
02-01 19:35:12.542 4183 4411 I SecHAL : OSI_timer_start: before pthread_create for timer thread
02-01 19:35:12.543 4183 4411 I SecHAL : OSI_timer_start: after pthread_create for timer thread
02-01 19:35:12.543 4183 4411 I SecHAL : OSI_timer_start: before osi_unlock
02-01 19:35:12.543 4183 4411 I SecHAL : OSI_timer_start: exit
02-01 19:35:12.543 4183 4411 I SecHAL : nfc_data_callback: !
02-01 19:35:12.543 4183 4411 D NfcAdaptation: NfcAdaptation::HalDeviceContextDataCallback: len=24
02-01 19:35:12.543 4183 4348 I BrcmNfcNfa: NFC received ntf gid:1
02-01 19:35:12.543 4183 4348 I BrcmNfcNfa: p2p priority is running under bail out mode ONLY.
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfc_set_state 4 (IDLE)->5 (OPEN)
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfc_ncif_proc_activate:21 0, mode:0x06
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_disc_discovery_cback (): event:0x4004
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_disc_sm_execute (): state: DISCOVERY (1), event: ACTIVATED_NTF(5) disc_flags: 0x1
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_disc_new_state (): old_state: DISCOVERY (1), new_state: POLL_ACTIVE (4) disc_flags: 0x1
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_disc_notify_activation (): tech_n_mode:0x6, proto:0x5
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_disc_get_disc_mask (): tech_n_mode:0x6, protocol:0x5, disc_mask:0x100
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: activated_protocol:0x5, activated_handle: 0x1
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_poll_disc_cback (): event:0x01
02-01 19:35:12.544 4183 4348 I BrcmNfcNfa: nfa_dm_notify_activation_status (): status:0x0
02-01 19:35:12.544 4183 4348 D BrcmNfcJni: nfaConnectionCallback: event= 5
02-01 19:35:12.544 4183 4348 D BrcmNfcJni: nfaConnectionCallback: NFA_ACTIVATED_EVT: gIsSelectingRfInterface=0, sIsDisabling=0
02-01 19:35:12.550 4183 4348 D BrcmNfcJni: NfcTag::setActivationState: state=2
02-01 19:35:12.550 4183 4348 D BrcmNfcJni: nfaConnectionCallback: NFA_ACTIVATED_EVT; is p2p
02-01 19:35:12.550 4183 4348 D BrcmNfcJni: nfaConnectionCallback: Disabling RF field events
02-01 19:35:12.550 4183 4348 I BrcmNfcNfa: NFA_SetConfig (): param_id:0x80
02-01 19:35:12.550 4183 4348 D BrcmNfcJni: nfaConnectionCallback: Disabled RF field events
02-01 19:35:12.550 4183 4348 I BrcmNfcNfa: nfa_dm_disc_sm_execute (): new state: POLL_ACTIVE (4), disc_flags: 0x1
02-01 19:35:12.551 4183 4348 I BrcmNfcNfa: NFA got event 0x0102
02-01 19:35:12.551 4183 4348 I BrcmNfcNfa: nfa_dm_evt_hdlr event: NFA_DM_API_SET_CONFIG_EVT (0x02)
02-01 19:35:12.551 4183 4348 I BrcmNfcNfa: nfa_dm_check_set_config ()
02-01 19:35:12.551 4183 4348 D NfcAdaptation: NfcAdaptation::HalWrite
02-01 19:35:12.551 4183 4348 I SecHAL : nfc_hal_write: enter;
02-01 19:35:12.551 4183 4348 I SecHAL : nfc_hal_write: exit;
02-01 19:35:12.551 4183 4411 D SecHAL : nfc_hal_task: Got a event: HAL_EVT_WRITE(3)
02-01 19:35:12.551 4183 4411 D SecHAL : nfc_hal_task: current state: SERVICE
02-01 19:35:12.552 4183 4411 I SecHAL : OSI_timer_start: enter,osi_lock
02-01 19:35:12.552 4183 4411 I SecHAL : OSI_timer_start: before osi_unlock
02-01 19:35:12.552 4183 4411 I SecHAL : OSI_timer_start: exit
02-01 19:35:12.552 4183 4411 I SecHAL : device_write: enter
02-01 19:35:12.552 4183 4411 I SecHAL : device_write: before system call
02-01 19:35:12.552 4183 4411 I SecHAL : device_write: after system call
02-01 19:35:12.553 4183 4411 D SecHAL : data_trace: Send( 7) 20 02 04 01 80 01 00
02-01 19:35:12.553 4183 4411 I SecHAL : device_write: exit
02-01 19:35:12.553 4183 4411 D SecHAL : nfc_hal_task: Got a event: HAL_EVT_READ(4)
02-01 19:35:12.553 4183 4410 D SecHAL : read_thread: Sent message to HAL message task, remind que: 2
02-01 19:35:12.553 4183 4411 D SecHAL : nfc_hal_task: current state: SERVICE
02-01 19:35:12.554 4183 4411 D SecHAL : data_trace: Recv( 5) 40 02 02 00 00
02-01 19:35:12.554 4183 4411 I SecHAL : OSI_timer_start: enter,osi_lock
02-01 19:35:12.554 4183 4411 I SecHAL : OSI_timer_start: before osi_unlock
02-01 19:35:12.554 4183 4411 I SecHAL : OSI_timer_start: exit
02-01 19:35:12.554 4183 4411 I SecHAL : nfc_data_callback: !
02-01 19:35:12.554 4183 4411 D NfcAdaptation: NfcAdaptation::HalDeviceContextDataCallback: len=5
02-01 19:35:12.555 4183 4348 I BrcmNfcNfa: NFC received rsp gid:0
02-01 19:35:12.555 4183 4348 I BrcmNfcNfa: nci_proc_core_rsp opcode:0x2
02-01 19:35:12.555 4183 4348 I BrcmNfcNfa: nfa_dm_nfc_response_cback () NFC_SET_CONFIG_REVT(0x5002)
02-01 19:35:12.555 4183 4348 D BrcmNfcJni: nfaDeviceManagementCallback: enter; event=0x2
02-01 19:35:12.555 4183 4348 D BrcmNfcJni: nfaDeviceManagementCallback: NFA_DM_SET_CONFIG_EVT
02-01 19:35:13.768 4183 19797 I SecHAL : device_sleep: NFC can be going to sleep
02-01 19:35:14.737 4364 19800 W GAv4-SVC: Network compressed POST connection error: java.net.ConnectException: Connection refused

No repeated reads possible, I had to switch NFC off and on again: https://drive.google.com/open?id=1POPcD2Fz0FDVEmSWg3Qi8qSM0pdhMoVj

This also takes a remarkably amount of time