If you want an easier opening #23 or #73, I would be looking for one of these models.
Tidioute
#735111T
Exotic Mexican Bocote Wood 35 pcs. no serial number
Jigged Brazilian Cherry Wood 18 pcs. no serial number
Burnt Grizzly Cut Bone 27 pcs. no serial number
#735111LT
Exotic Mexican Bocote Wood 33 pcs. no serial number
Jigged Brazilian Cherry Wood 19 pcs. no serial number
Burnt Grizzly Cut Bone 55 pcs. no serial number
Northfield
#735111T
Cocobolo Wood 27 pcs. no serial number
Dark Cocobolo Wood 10 pcs. no serial number
Burnt Stag 35 pcs. serialized 47 pcs. no serial number
Genuine Stag 24 pcs. serialized
Walnut Stain Jig Bone 39 pcs. no serial number
#735111LT
Cocobolo Wood 30 pcs. no serial number
Dark Cocobolo Wood 5 pcs. no serial number
Burnt Stag 35 pcs. serialized 55 pcs. no serial number
Genuine Stag 23 pcs. serialized
Walnut Stain Jig Bone 39 pcs. no serial number
Tidioute
#235111T
Ebony Wood 31 pcs. no serial number
Exotic Mexican Bocote Wood 27 pcs. no serial number
Burnt Grizzly Cut Bone 25 pcs. serialized 25 pcs. no serial number
#235111LT
Ebony Wood 29 pcs. no serial number
Burnt Grizzly Cut Bone 25 pcs. serialized 24 pcs. no serial number
Exotic Mexican Bocote Wood 29 pcs. no serial number
Northfield
#235111T
Primitive Bone 18 pcs. serialized
Cocobolo Wood 25 pcs. serialized 19 pcs. no serial number
Burnt Stag 35 pcs. serialized 19 pcs. no serial number
Natural Stag 10 pcs. serialized
Garnet Jig Bone 21 pcs. no serial number
Autumn Gold Jig Bone 16 pcs. no serial number
#235111LT
Cocobolo Wood 25 pcs. serialized 21 pcs. no serial number
Garnet Jig Bone 21 pcs. no serial number
Burnt Stag 35 pcs. serialized 29 pcs. no serial number
Natural Stag 8 pcs. serialized
Autumn Gold Jig Bone 25 pcs. no serial number
Genuine Stag 21 pcs. serialized
In my experience, these with lanyard tubes are easier to open than those with a solid rear pin or end cap. The Jigged Brazilian Cherry #73 in this picture was made only a few months before those with tubes. It was a 7-8 when I got it, now its maybe a 6.5. It was replaced as my go to user #73 by the grizzly bone #73T in the second pic which is a solid 5. In my experience (including only 2 #23Ts) the pulls on these were about 4.5-6. Also, a Tidioute model will have a deeper nail nick giving you better purchase making it less likely to slip and easier to open. Something to consider imho.