diff --git a/ereuse_devicehub/resources/device/models.py b/ereuse_devicehub/resources/device/models.py
index 5cf37afe..39ab0cf2 100644
--- a/ereuse_devicehub/resources/device/models.py
+++ b/ereuse_devicehub/resources/device/models.py
@@ -76,7 +76,11 @@ class Device(Thing):
         'parent_id',
         'hid',
         'production_date',
-        'color'
+        'color',  # these are only user-input thus volatile
+        'width',
+        'height',
+        'depth',
+        'weight'
     }
 
     def __init__(self, **kw) -> None:
diff --git a/ereuse_devicehub/resources/device/sync.py b/ereuse_devicehub/resources/device/sync.py
index 156b8734..07c238e2 100644
--- a/ereuse_devicehub/resources/device/sync.py
+++ b/ereuse_devicehub/resources/device/sync.py
@@ -1,7 +1,9 @@
+import difflib
 from contextlib import suppress
 from itertools import groupby
 from typing import Iterable, Set
 
+import yaml
 from sqlalchemy import inspect
 from sqlalchemy.exc import IntegrityError
 from sqlalchemy.util import OrderedSet
@@ -166,11 +168,16 @@ class Sync:
             sample_tag = next(iter(linked_tags))
             for tag in linked_tags:
                 if tag.device_id != sample_tag.device_id:
-                    raise MismatchBetweenTags(tag, sample_tag)  # Linked to different devices
+                    raise MismatchBetweenTags(tag, sample_tag)  # Tags linked to different devices
             if db_device:  # Device from hid
                 if sample_tag.device_id != db_device.id:  # Device from hid != device from tags
                     raise MismatchBetweenTagsAndHid(db_device.id, db_device.hid)
             else:  # There was no device from hid
+                if sample_tag.device.physical_properties != device.physical_properties:
+                    # Incoming physical props of device != props from tag's device
+                    # which means that the devices are not the same
+                    raise MismatchBetweenProperties(sample_tag.device.physical_properties,
+                                                    device.physical_properties)
                 db_device = sample_tag.device
         if db_device:  # Device from hid or tags
             self.merge(device, db_device)
@@ -254,3 +261,12 @@ class MismatchBetweenTagsAndHid(ValidationError):
         message = 'Tags are linked to device {} but hid refers to device {}.'.format(device_id,
                                                                                      hid)
         super().__init__(message, field_names)
+
+
+class MismatchBetweenProperties(ValidationError):
+    def __init__(self, props1, props2, field_names={'device'}):
+        message = 'The device from the tag and the passed-in differ the following way:'
+        message += '\n'.join(
+            difflib.ndiff(yaml.dump(props1).splitlines(), yaml.dump(props2).splitlines())
+        )
+        super().__init__(message, field_names)
diff --git a/tests/test_device.py b/tests/test_device.py
index 3eeb7adb..d8a5d87f 100644
--- a/tests/test_device.py
+++ b/tests/test_device.py
@@ -116,19 +116,11 @@ def test_physical_properties():
         'serial': None,
         'firewire': None,
         'manufacturer': 'mr',
-        'weight': None,
-        'height': None,
-        'width': 2.0,
-        'depth': None
     }
     assert pc.physical_properties == {
         'model': 'foo',
         'manufacturer': 'bar',
         'serial_number': 'foo-bar',
-        'weight': 2.8,
-        'width': 1.4,
-        'height': 2.1,
-        'depth': None,
         'chassis': ComputerChassis.Tower
     }
 
diff --git a/tests/test_snapshot.py b/tests/test_snapshot.py
index 2e8ad343..8dde37ba 100644
--- a/tests/test_snapshot.py
+++ b/tests/test_snapshot.py
@@ -12,7 +12,8 @@ from ereuse_devicehub.db import db
 from ereuse_devicehub.devicehub import Devicehub
 from ereuse_devicehub.resources.device import models as m
 from ereuse_devicehub.resources.device.exceptions import NeedsId
-from ereuse_devicehub.resources.device.sync import MismatchBetweenTagsAndHid
+from ereuse_devicehub.resources.device.sync import MismatchBetweenProperties, \
+    MismatchBetweenTagsAndHid
 from ereuse_devicehub.resources.enums import ComputerChassis, SnapshotSoftware
 from ereuse_devicehub.resources.event.models import AggregateRate, BenchmarkProcessor, \
     EraseSectors, Event, Snapshot, SnapshotRequest, WorkbenchRate
@@ -246,10 +247,8 @@ def test_snapshot_tag_inner_tag_mismatch_between_tags_and_hid(user: UserClient,
     user.post(pc2, res=Snapshot, status=MismatchBetweenTagsAndHid)
 
 
-@pytest.mark.xfail(reason='There is no attribute checking for tag-matching devices')
 def test_snapshot_different_properties_same_tags(user: UserClient, tag_id: str):
-    """
-    Tests a snapshot performed to device 1 with tag A and then to
+    """Tests a snapshot performed to device 1 with tag A and then to
     device 2 with tag B. Both don't have HID but are different type.
     Devicehub must fail the Snapshot.
     """
@@ -262,9 +261,9 @@ def test_snapshot_different_properties_same_tags(user: UserClient, tag_id: str):
     pc2 = file('basic.snapshot')
     pc2['uuid'] = uuid4()
     pc2['device']['tags'] = pc1['device']['tags']
-    del pc2['device'][
-        'model']  # pc2 model is unknown but pc1 model is set = different characteristic
-    user.post(pc2, res=Snapshot, status=422)
+    # pc2 model is unknown but pc1 model is set = different property
+    del pc2['device']['model']
+    user.post(pc2, res=Snapshot, status=MismatchBetweenProperties)
 
 
 def test_snapshot_upload_twice_uuid_error(user: UserClient):